Treeview, checkboxes, howto?

[Chris Holbrook Member Find all posts View Profile Close Chris Holbrook]

I started with a treeview to respresent a heirarchy with just two layers, and used the "selected" state of items to drive some processing. This works, but processing a single selection at a time is a trifle wearying for the user, so I aim to adapt the application to retreive any checked parent name and the names of any checked children, each preceded by the parent name, then process the whole batch together. I investigated multiple selections from the treeview. This looked hard, so I turned back towards using checkboxes.
This requires a few pieces to be fitted together, including:

1. How to turn off "selectability" - it's confusing having a selected item flashing away when you are checking boxes somewhere else.
   
2. How to make the program check the parent if one of its children is checked, the parent can also be checked by the user.

Any hints, tips, nudges or wrinkles will be welcome.

[Ian Cairns Member Find all posts View Profile Close Ian Cairns]

I am also working on a treeview currently, but without checkboxes. This one by Kev Peel gives a good start.
http://www.powerbasic.com/support/pb...light=treeview
regards, Ian

[Steve Rossell Member Find all posts View Profile Close Steve Rossell]

Here is an example of almost everything you can do with a treeview control

#COMPILE EXE
#DIM ALL

#INCLUDE "WIN32API.INC"
#INCLUDE "InitCtrl.inc"
#INCLUDE "COMMCTRL.INC"

#RESOURCE "TView.pbr"

%ID_TVIEW     = 1000
%IDC_BUTTON1  = 1001
%IDC_BUTTON2  = 1002
%IDC_BUTTON3  = 1003
%IDC_BUTTON4  = 1004
%IDC_BUTTON5  = 1005
%IDC_BUTTON6  = 1006
%IDC_BUTTON7  = 1007
%IDC_BUTTON8  = 1008
%IDC_BUTTON9  = 1009
%IDC_BUTTON10 = 1010
%IDC_BUTTON11 = 1011
%IDC_BUTTON12 = 1012
%IDC_BUTTON13 = 1013
%IDC_BUTTON14 = 1014
%IDC_BUTTON15 = 1015
%IDC_BUTTON16 = 1016
%IDC_BUTTON17 = 1017
%IDC_BUTTON18 = 1018
%IDC_BUTTON19 = 1019
%IDC_BUTTON20 = 1020
%IDC_BUTTON21 = 1021
%IDC_BUTTON22 = 1022
%IDC_BUTTON23 = 1023
%IDC_BUTTON24 = 1024
%IDC_BUTTON25 = 1025
%IDC_BUTTON26 = 1026
%IDC_BUTTON27 = 1027
%IDC_BUTTON28 = 1028
%IDC_BUTTON29 = 1029
%IDC_BUTTON30 = 1030
%IDC_BUTTON31 = 1031
%IDC_BUTTON32 = 1032
%IDC_BUTTON33 = 1033
%IDC_BUTTON34 = 1034
%IDC_BUTTON35 = 1035
%IDC_BUTTON36 = 1036
%IDC_BUTTON37 = 1037
%IDC_BUTTON38 = 1038
%IDC_BUTTON39 = 1039
%IDC_BUTTON40 = 1040
%IDC_BUTTON41 = 1041
%IDC_BUTTON42 = 1042
%IDC_BUTTON43 = 1043
%IDC_BUTTON44 = 1044
%IDC_BUTTON45 = 1045

%ID_HASBUTTONS       = 1006
%ID_HASLINES         = 1004
%ID_HASLINESATROOT   = 1005
%ID_HASSHOWSELALWAYS = 1007
%ID_HASEDITLABELS    = 1008
%ID_HASCHECKBOXES    = 1009
%IDC_FRAME1          = 1010
%IDC_LABEL1          = 1011
%IDOK                =    1
%ID_HASFULLROWSELECT       = 1012
%ID_HASINFOTIP             = 1013
%ID_HASNONEVENHEIGHT       = 1014
%ID_HASNOTOOLTIPS          = 1015
%ID_HASRTLREADING          = 1016
%ID_HASSINGLEEXPAND        = 1017
%ID_HASTRACKSELECT         = 1018
%ID_HASNOHSCROLL           = 1019
%ID_HASNOSCROLL            = 1020
%IDC_FRAME2                = 1026
%ID_HASAUTOSCROLL          = 1021
%ID_HASDIMMEDCHECKBOXES    = 1022
%ID_HASDOUBLEBUFFER        = 1023
%ID_HASDRAWIMAGESYNC       = 1024
%ID_HASEXCLUSIONCHECKBOXES = 1025
%ID_HASFADEINOUTEXPANDOS   = 1027
%ID_HASNOINDENTSTATE       = 1028
%ID_HASPARTIALCHECKBOXES   = 1029
%ID_HASRICHTOOLTIP         = 1030

GLOBAL TVStyles AS LONG
GLOBAL TVExStyles AS LONG

DECLARE FUNCTION BuildImagelist AS DWORD
DECLARE SUB GetTVStyles

FUNCTION PBMAIN () AS LONG
  LOCAL hdlg AS DWORD

  GetTVStyles
  TVStyles = TVStyles OR %WS_CHILD OR %WS_VISIBLE OR %WS_TABSTOP

  ' Extended styles for the TreeView
  TVExStyles = TVExStyles OR %WS_EX_CONTROLPARENT OR %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR

  'InitComCtl32

  DIALOG NEW PIXELS, 0, "TreeView Example", , , 880, 604, %WS_POPUP OR %WS_BORDER OR %WS_DLGFRAME OR %WS_SYSMENU OR %WS_CLIPSIBLINGS OR %WS_VISIBLE OR _
    %DS_MODALFRAME OR %DS_3DLOOK OR %DS_NOFAILCREATE OR %DS_SETFONT, %WS_EX_CONTROLPARENT OR %WS_EX_LEFT OR %WS_EX_LTRREADING OR %WS_EX_RIGHTSCROLLBAR, TO _
    hDlg

  CONTROL ADD "SysTreeView32", hDlg, %ID_TVIEW, "SysTreeView32_1", 2, 2, 245, 599, TVStyles, TVExStyles

   CONTROL ADD BUTTON, hDlg, %IDC_BUTTON1, "SET TEXT", 260, 8, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON2, "EDIT TEXT", 260, 73, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON3, "INSERT SIBLING AFTER", 465, 203, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON4, "DELETE", 260, 301, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON5, "SET IMAGE|SELIMAGE", 465, 73, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON6, "GET PARENT", 260, 138, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON7, "GET CHILD", 260, 171, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON8, "EXPAND|COLLAPSE", 465, 106, 201, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON9, "GET COUNT", 260, 528, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON28, "INSERT SIBLING LAST", 465, 171, 201, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON29, "INSERT CHILD LAST", 465, 301, 201, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON10, "GET CHECK", 260, 366, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON11, "SET CHECK", 260, 398, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON12, "GET [FIRST|PREV|NEXT] VISIBLE", 260, 236, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON13, "GET INDENT", 260, 431, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON14, "SET INDENT", 260, 463, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON15, "INSERTMARK", 465, 8, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON16, "INSERTMARK COLOR", 465, 41, 201, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON17, "GET TEXT", 260, 41, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON18, "GET SELECTED", 260, 496, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON19, "RESET", 260, 333, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON20, "ENDEDIT", 260, 106, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON21, "GET ROOT", 260, 268, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON22, "GET [PREV|NEXT] SIBLING", 260, 203, 200, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON23, "INSERT SIBLING FIRST", 465, 138, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON24, "INSERT SIBLING SORTED", 465, 236, 201, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON25, "GET VISIBLE COUNT", 260, 561, 200, 32
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON26, "INSERT CHILD FIRST", 465, 268, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON27, "INSERT CHILD AFTER", 465, 333, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON30, "SET BOLD [ON|OFF]", 465, 365, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON31, "GET BOLD", 465, 397, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON32, "ISEXPANDED", 465, 429, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON33, "SET LINECOLOR", 465, 461, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON34, "GET LINECOLOR", 465, 493, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON35, "SET TEXTCOLOR", 465, 525, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON36, "GET TEXTCOLOR", 465, 557, 201, 31
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON37, "SELECT", 670, 8, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON38, "SET VISIBLE", 670, 40, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON39, "SET ITEMHEIGHT", 670, 72, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON40, "GET ITEMHEIGHT", 670, 104, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON41, "SORT CHILDREN", 670, 136, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON42, "SORT CHILDREN [CALL SortingCallback]", 670, 168, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON43, "GET LPARAM", 670, 200, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON44, "SET LPARAM", 670, 232, 201, 33
  CONTROL ADD BUTTON, hDlg, %IDC_BUTTON45, "INSERT CHILD SORTED", 670, 264, 201, 33


  LOCAL hImageList AS DWORD
  LOCAL tTVInsert  AS TV_INSERTSTRUCT
  LOCAL hTree      AS DWORD
  LOCAL sItem      AS STRING
  LOCAL hNode      AS DWORD
  LOCAL hParentNode AS DWORD

  RANDOMIZE

  hTree = GetDlgItem(hdlg, %ID_TVIEW)
'  local s as asciiz * 255
'  s = "explorer"
'  SetWindowTheme(hTree, byval varptr(s), byval 0)

  hImageList = BuildImageList
  TreeView_SetImageList(hTree, hImageList, %TVSIL_NORMAL)

  '************************************************************************************'
  ' Insert some items (parent and child nodes) into the treeview                      *'
  '************************************************************************************'

  sItem                          = "Root 1"        ' Text to be used for the Node
  tTVInsert.hParent              = 0               ' Parent Node, If TVI_ROOT or NULL, the item is inserted at the root
  tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_CHILDREN OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
  tTVInsert.Item.Item.pszText    = STRPTR(sItem)   ' Text used for the item
  tTVInsert.Item.Item.cchTextMax = LEN(sItem)      ' Length of text for the item
  tTVInsert.Item.Item.cchildren  = 1               ' Node as 1 or more child nodes
  tTVInsert.Item.Item.iImage     = 0
  tTVInsert.Item.Item.iSelectedImage = 1
  tTVInsert.Item.Item.lParam = RND(1, 10000)
  hParentNode = TreeView_InsertItem(hTree, tTVInsert)    ' Insert a new item and return its handle
  TreeView_SelectItem(htree, hParentNode)

  sItem                          = "Child 1 of Root 1 "
  tTVInsert.hParent              = hParentNode           ' Use the handle returned from inserted the root node
  tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_CHILDREN OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
  tTVInsert.Item.Item.pszText    = STRPTR(sItem)
  tTVInsert.Item.Item.cchTextMax = LEN(sItem)
  tTVInsert.Item.Item.cchildren  = 1
  tTVInsert.Item.Item.iImage     = 2
  tTVInsert.Item.Item.iSelectedImage = 3
  tTVInsert.Item.Item.lParam = RND(1, 10000)
  hNode = TreeView_InsertItem(hTree, tTVInsert)

  sItem                          = "Child 1 of (Root 1, Child 1)"
  tTVInsert.hParent              = hNode
  tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
  tTVInsert.Item.Item.pszText    = STRPTR(sItem)
  tTVInsert.Item.Item.cchTextMax = LEN(sItem)
  tTVInsert.Item.Item.iImage     = 4
  tTVInsert.Item.Item.iSelectedImage = 5
  tTVInsert.Item.Item.lParam = RND(1, 10000)
  TreeView_InsertItem(hTree, tTVInsert)

  sItem                          = "Child 2 of Root 1 "
  tTVInsert.hParent              = hParentNode           ' Use the handle returned from inserted the root node
  tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
  tTVInsert.Item.Item.pszText    = STRPTR(sItem)
  tTVInsert.Item.Item.cchTextMax = LEN(sItem)
  tTVInsert.Item.Item.iImage     = 2
  tTVInsert.Item.Item.iSelectedImage = 3
  tTVInsert.Item.Item.lParam = RND(1, 10000)
  hNode = TreeView_InsertItem(hTree, tTVInsert)

  sItem                          = "Root 2 "
  tTVInsert.hParent              = 0
  tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_CHILDREN OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
  tTVInsert.Item.Item.pszText    = STRPTR(sItem)
  tTVInsert.Item.Item.cchTextMax = LEN(sItem)
  tTVInsert.Item.Item.cchildren  = 1
  tTVInsert.Item.Item.iImage     = 2
  tTVInsert.Item.Item.iSelectedImage = 3
  tTVInsert.Item.Item.lParam = RND(1, 10000)
  hNode = TreeView_InsertItem(hTree, tTVInsert)

  sItem                          = "Child 1 of Root 2"
  tTVInsert.hParent              = hNode
  tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
  tTVInsert.Item.Item.pszText    = STRPTR(sItem)
  tTVInsert.Item.Item.cchTextMax = LEN(sItem)
  tTVInsert.Item.Item.iImage     = 0
  tTVInsert.Item.Item.iSelectedImage = 1
  tTVInsert.Item.Item.lParam = RND(1, 10000)
  TreeView_InsertItem(hTree, tTVInsert)

  DIALOG SHOW MODAL hDlg, CALL DlgProc

  ImageList_Destroy(hImageList)
END FUNCTION

CALLBACK FUNCTION DlgProc
  LOCAL tTVItem     AS TV_ITEM
  LOCAL tTVInsert   AS TV_INSERTSTRUCT
  LOCAL hNode       AS DWORD
  LOCAL hChildNode  AS DWORD
  LOCAL hTree       AS DWORD
  LOCAL hParent     AS DWORD
  LOCAL TVnm        AS NM_TREEVIEW PTR
  LOCAL TVht        AS TV_HITTESTINFO
  STATIC OldText    AS STRING
  LOCAL NewText     AS STRING
  LOCAL hTVEdit     AS DWORD
  LOCAL s           AS STRING
  LOCAL s1          AS STRING
  LOCAL i           AS LONG
  LOCAL dwPos       AS DWORD
  LOCAL tTVSortCB   AS TV_SORTCB

  hTree =  GetDlgItem(CBHNDL, %ID_TVIEW)

  SELECT CASE AS LONG CBMSG

    CASE %WM_COMMAND
      SELECT CASE AS LONG CBCTL

        CASE %IDC_BUTTON1
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Change the text of the selected node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            NewText = "Set Text "+TIME$

            tTVItem.Mask = %TVIF_TEXT
            tTVItem.hItem = hNode
            tTVItem.pszText = STRPTR(NewText)
            tTVItem.cchTextMax = LEN(NewText)

            'TreeView_SetItem(hTree, tTVItem)
            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))

          END IF

        CASE %IDC_BUTTON2
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Edit the text of the first child of the first root

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Cuases an edit box to be displayed at the node text
            TreeView_EditLabel(hTree, hNode)

            ' If you do not handle the TVN_ENDLABELEDIT message then the text
            ' the user entered is discarded and the original text is set.

            ' It is not necessary to handle the TVN_BEGINLABELEDIT notification but
            ' it is a good idea to do so and limit the length of the text that the user may
            ' enter into the edit control.

          END IF

        CASE %IDC_BUTTON3
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new item after the selected item of the selected item

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the parent of the selected node
            hParent = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PARENT, hNode)

            tTVInsert.hParent      = hParent' It will have the same parent as the selected node
            tTVInsert.hInsertAfter = hNode  ' Insert it after the first root node

            NewText = "New After Node "+TIME$

            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 0
            tTVInsert.Item.Item.iSelectedImage = 1
            tTVInsert.Item.Item.lParam = RND(1, 10000)

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))

          END IF

        CASE %IDC_BUTTON4
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Delete the selected node

            hNode = TreeView_GetSelection(hTree)  ' Get the handle of the selected node
            TreeView_DeleteItem(hTree, hNode)     ' Delete the node

            ' If hNode above is TVI_ROOT then all nodes are deleted.
            ' You could also call TreeView_DeleteAllItems to delete all items.

          END IF

        CASE %IDC_BUTTON5
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Change the images associated with a node

            hNode = TreeView_GetSelection(hTree)  ' Get the handle of the selected node

            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE ' Get the image information
            tTVItem.iImage = 7
            tTVItem.iSelectedImage = 6
            TreeView_SetItem(hTree, tTVItem)

          END IF

        CASE %IDC_BUTTON6
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the parent node of the selected node

            hNode = TreeView_GetSelection(hTree)     ' Get the handle of the selected node
            hNode = TreeView_GetParent(hTree, hNode) ' Get the handle of the parent of this node

            ' Does this node have a parent?
            IF hNode=%NULL THEN
              ' The node does not have a parent

              NewText = "This node does not have a parent"

            ELSE
              ' Get the text of the parent node

              NewText = SPACE$(255)

              tTVItem.hItem = hNode              ' Handle of node to get text of
              tTVItem.mask  = %TVIF_TEXT         ' We only need the text
              tTVItem.pszText = STRPTR(NewText)  ' String to put text in
              tTVItem.cchTextMax = 255           ' Max string length

              TreeView_GetItem(hTree, tTVItem)
            END IF

            ? "The parent is:"+$CRLF+NewText

          END IF

        CASE %IDC_BUTTON7
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Enumerate children of the selected node

            hNode = TreeView_GetSelection(hTree)     ' Get the handle of the selected node

            s = ""

            hNode = TreeView_GetChild(hTree, hNode)

            WHILE (hNode<>%NULL)
              ' Get the text of the child node found

              NewText = SPACE$(255)

              tTVItem.hItem = hNode              ' Handle of node to get text of
              tTVItem.mask  = %TVIF_TEXT         ' We only need the text
              tTVItem.pszText = STRPTR(NewText)  ' String to put text in
              tTVItem.cchTextMax = 255           ' Max string length

              TreeView_GetItem(hTree, tTVItem)

              s = s + RTRIM$(REMOVE$(NewText, ANY CHR$(0))) + $CRLF

              ' Get the next child node from the parent
              ' Since hNode is a child of the parent node then
              ' the easiest thing to do is to find this childs siblings
              ' Otherwise we would have to have another variable for
              ' the parent node
              hNode = TreeView_GetNextSibling(hTree, hNode)
            WEND

            IF s = "" THEN s = "**This node has no children**"
            s = "Found the following child nodes:"+$CRLF+s
            ? s

          END IF

        CASE %IDC_BUTTON8
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Expand an unexpanded node or collapse an expanded node

            hNode= TreeView_GetSelection(hTree)     ' Get the handle of the selected node

            ' Toggle the node : If expanded then collapse it or if collapsed expand it
            TreeView_Expand(hTree, hNode, %TVE_TOGGLE)

            ' You can also use TVE_EXPAND or TVE_COLLAPSE to explictly expand or
            ' collapse a node. TVE_COLLAPSE OR TVE_COLLAPSERESET will collapse and
            ' delete all child nodes.

          END IF

        CASE %IDC_BUTTON9
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the count of all items in the treeview

            ? "The count of items in the tree view is "+FORMAT$(TreeView_GetCount(hTree))

          END IF

        CASE %IDC_BUTTON10
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the checked/unchecked/no checkbox state of the selected item

            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)
            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_STATE OR %TVIF_HANDLE
            tTVItem.stateMask = %TVIS_STATEIMAGEMASK

            SendMessage(hTree, %TVM_GETITEM, 0, BYVAL VARPTR(tTVItem))
            i = tTVItem.state

            ' Not really sure why this works but it does
            ' MSDN says that that the return value is a unsigned int but then it says
            ' it can return a -1.
            ' I found the code below on several sites but no one explains why it works
            '
            ' Found this by accident in the Win32 SDK:
            ' The INDEXTOSTATEIMAGEMASK macro prepares the index of a state image so that a tree-view
            ' control or list-view control can use the index to retrieve the state image for an item.
            '
            ' This makes sense that it converts the imagemask to an imagelist index - the checkbox
            ' as actuall two images one checked and one unchecked.
            SHIFT RIGHT i, 12

            SELECT CASE AS LONG i
              CASE 0
                s = "There is no checkbox for this item"
              CASE 1
                s = "Unchecked"
              CASE 2
                s = "Checked"
              CASE ELSE
                s = "Something went wrong and I got an incorrect value!"
            END SELECT
            ? s

          END IF

        CASE %IDC_BUTTON11
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the checkbox to checked for the selected item

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_STATE OR %TVIF_HANDLE
            tTVItem.stateMask = %TVIS_STATEIMAGEMASK

            ' 1 = Checkbox not checked
            ' 2 = Checkbox is checked
            ' See %IDC_BUTTON10 callback notes
            i = 2
            SHIFT LEFT i, 12
            tTVItem.state = i

            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
          END IF


        CASE %IDC_BUTTON12
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the first visible node in the treeview
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_FIRSTVISIBLE, 0)

            ' Get the text of (hNode) the first visible node item
            NewText = SPACE$(255)
            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_TEXT
            tTVItem.pszText = STRPTR(NewText)
            tTVItem.cchTextMax = 255
            SendMessage(hTree, %TVM_GETITEM, BYVAL 0, BYVAL VARPTR(tTVItem))

            s1 = "The text of the first visible node is:"+$CRLF+RTRIM$(REMOVE$(NewText, ANY CHR$(0)))+$CRLF

            ' Get the handle of the selected item
            hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the previous visible item
            s = ""
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PREVIOUSVISIBLE, hChildNode)

            WHILE (hNode<>%NULL)
              ' Get the text of the child node found

              NewText = SPACE$(255)

              tTVItem.hItem = hNode              ' Handle of node to get text of
              tTVItem.mask  = %TVIF_TEXT         ' We only need the text
              tTVItem.pszText = STRPTR(NewText)  ' String to put text in
              tTVItem.cchTextMax = 255           ' Max string length

              TreeView_GetItem(hTree, tTVItem)

              s = s + RTRIM$(REMOVE$(NewText, ANY CHR$(0))) + $CRLF

              ' Get the next sibling
              hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PREVIOUSVISIBLE, hNode)
            WEND

            s1 = s1 + $CRLF + "The previous visible items are:"+$CRLF+s+$CRLF

            ' Get the next siblings
            s= ""
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_NEXTVISIBLE, hChildNode)
            WHILE (hNode<>%NULL)
              ' Get the text of the child node found

              NewText = SPACE$(255)

              tTVItem.hItem = hNode              ' Handle of node to get text of
              tTVItem.mask  = %TVIF_TEXT         ' We only need the text
              tTVItem.pszText = STRPTR(NewText)  ' String to put text in
              tTVItem.cchTextMax = 255           ' Max string length

              TreeView_GetItem(hTree, tTVItem)

              s = s + RTRIM$(REMOVE$(NewText, ANY CHR$(0))) + $CRLF

              ' Get the next sibling
              hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_NEXTVISIBLE, hNode)
            WEND

            s1 = s1 + $CRLF + "The next visible items are:"+$CRLF+s
            ? s1
          END IF


        CASE %IDC_BUTTON13
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the amount of indention of child nodes from parent nodes in pixels

            i = SendMessage(hTree, %TVM_GETINDENT , 0, 0)
            ? "The indention of child nodes from there parent is "+FORMAT$(i)+" pixels"
          END IF

        CASE %IDC_BUTTON14
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the amount of idention in pixesl of child nodes from parent nodes
            i = VAL(INPUTBOX$("Enter the amount of indention in pixels (THERE IS ERROR CHECKING!)"+_
                              $CRLF+"SDK says any value less than the system minimum is ignored."+_
                              $CRLF+"The system minimum can be found by enter -1 for the indention"+ _
                              $CRLF+"and then getting the indention (There is a button for this)", _
                              "Enter indention amount"))

            SendMessage(hTree, %TVM_SETINDENT , i, 0)
          END IF

        CASE %IDC_BUTTON15
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the Insert Mark. This is used to ask the user where
            ' They would like a new node inserted. The wparam in SendMessage
            ' says if the insert mark is show above or below the lparam hnode

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Show the Insert Mark
            SendMessage(hTree, %TVM_SETINSERTMARK, 0, hNode )
          END IF

        CASE %IDC_BUTTON16
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the Insert Mark Color to %RED
            SendMessage(hTree, %TVM_SETINSERTMARKCOLOR, 0, %RED)
          END IF

        CASE %IDC_BUTTON17
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the text of the selected node

            ' Get the handle of the selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the text of (hNode) the first visible node item
            s = SPACE$(255)
            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_TEXT
            tTVItem.pszText = STRPTR(s)
            tTVItem.cchTextMax = 255
            SendMessage(hTree, %TVM_GETITEM, BYVAL 0, BYVAL VARPTR(tTVItem))
            ? "The text of this node is "+s
          END IF


        CASE %IDC_BUTTON18
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the handle of the selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the text of (hNode) the first visible node item
            s = SPACE$(255)
            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_TEXT
            tTVItem.pszText = STRPTR(s)
            tTVItem.cchTextMax = 255
            SendMessage(hTree, %TVM_GETITEM, BYVAL 0, BYVAL VARPTR(tTVItem))
            ? "The handle of this node is "+HEX$(hNode)+$CRLF+"The text of this node is "+s
          END IF

        CASE %IDC_BUTTON19
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Delete all items from the treeview
            SendMessage(hTree, %TVM_DELETEITEM, 0, %TVI_ROOT)
          END IF

        CASE %IDC_BUTTON20
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' End editing of a treeview node label/text
            ? "See the notes for the %IDC_BUTTON2 and %TVN_ENDLABELEDIT message handlers"
          END IF

        CASE %IDC_BUTTON21
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the handle of the root node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_ROOT, 0)

            ' Get the text of (hNode) the root node
            s = SPACE$(255)
            tTVItem.hItem = hNode
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_TEXT
            tTVItem.pszText = STRPTR(s)
            tTVItem.cchTextMax = 255
            SendMessage(hTree, %TVM_GETITEM, BYVAL 0, BYVAL VARPTR(tTVItem))
            ? "The handle of the root node is "+HEX$(hNode)+$CRLF+"The text of the root node is "+s
          END IF

        CASE %IDC_BUTTON22
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the siblings of the selected node

            ' Get the handle of the selected node
            hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            s = ""
            s1= ""

            ' Get the previous sibilings
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PREVIOUS, hChildNode)

            WHILE (hNode<>%NULL)
              ' Get the text of the child node found

              NewText = SPACE$(255)

              tTVItem.hItem = hNode              ' Handle of node to get text of
              tTVItem.mask  = %TVIF_TEXT         ' We only need the text
              tTVItem.pszText = STRPTR(NewText)  ' String to put text in
              tTVItem.cchTextMax = 255           ' Max string length

              TreeView_GetItem(hTree, tTVItem)

              s = s + RTRIM$(REMOVE$(NewText, ANY CHR$(0))) + $CRLF

              ' Get the next sibling
              hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PREVIOUS, hNode)
            WEND

            ' Get the next siblings
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_NEXT, hChildNode)
            WHILE (hNode<>%NULL)
              ' Get the text of the child node found

              NewText = SPACE$(255)

              tTVItem.hItem = hNode              ' Handle of node to get text of
              tTVItem.mask  = %TVIF_TEXT         ' We only need the text
              tTVItem.pszText = STRPTR(NewText)  ' String to put text in
              tTVItem.cchTextMax = 255           ' Max string length

              TreeView_GetItem(hTree, tTVItem)

              s1 = s1 + RTRIM$(REMOVE$(NewText, ANY CHR$(0))) + $CRLF

              ' Get the next sibling
              hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_NEXT, hNode)
            WEND

            IF (s = "" AND s1="") THEN s = "**This node has no siblings**":EXIT FUNCTION

            s = "Previous Sibling Nodes:"+$CRLF+s+$CRLF+"Next Sibling Nodes:"+$CRLF+s1
            ? s
          END IF

        CASE %IDC_BUTTON23
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new item as the first sibling of the selected node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the parent of the selected node
            hParent = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PARENT, hNode)

            tTVInsert.hParent      = hParent' It will have the same parent as the selected node
            tTVInsert.hInsertAfter = %TVI_FIRST     ' Insert it as the first item

            NewText = "New first item Node "+TIME$

            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 0
            tTVInsert.Item.Item.iSelectedImage = 1
            tTVInsert.Item.Item.lParam = RND(1, 10000)

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))
          END IF

        CASE %IDC_BUTTON24
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new item as a sibling of the selected node in sorted order

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the parent of the selected node
            hParent = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PARENT, hNode)

            tTVInsert.hParent      = hParent' It will have the same parent as the selected node
            tTVInsert.hInsertAfter = %TVI_SORT     ' Insert it in sorted order

            NewText = "New sorted Node "+TIME$

            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 0
            tTVInsert.Item.Item.iSelectedImage = 1
            tTVInsert.Item.Item.lParam = RND(1, 10000)

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))
          END IF

        CASE %IDC_BUTTON25
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the count of the number of items that be visible
            i = SendMessage(hTree, %TVM_GETVISIBLECOUNT, 0, 0)
            ? "The number of items that can be FULLY visible is "+FORMAT$(i)
          END IF

        CASE %IDC_BUTTON26
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new child node as the first child of the selected node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Insert a new child node as the first child of the selected node
            NewText = "Child First "+TIME$
            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 2
            tTVInsert.Item.Item.iSelectedImage = 3
            tTVInsert.Item.Item.lParam = RND(1, 10000)
            tTVInsert.hParent = hNode
            tTVInsert.hInsertAfter = %TVI_FIRST

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))

            ' Make sure that the selected node (parent of the new child) has it's children member of it's TV_ITEM set
            tTVItem.mask = %TVIF_CHILDREN OR %TVIF_HANDLE
            tTVItem.hItem = hNode
            tTVItem.cChildren = 1

            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
          END IF

        CASE %IDC_BUTTON27
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new child node of the selected parent after the specified node
            ' In this case the specified node will be the first child of the selected node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the first child node of the selected node
            hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CHILD, hNode)

            ' Insert a new child node as the first child of the selected node
            NewText = "Child First "+TIME$
            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 2
            tTVInsert.Item.Item.iSelectedImage = 3
            tTVInsert.Item.Item.lParam = RND(1, 10000)

            ' If there is no child node to insert this new node after then
            ' just make it the first item in the node
            IF hChildNode<>0 THEN
              tTVInsert.hInsertAfter = hChildNode
            ELSE
              tTVInsert.hInsertAfter = %TVI_FIRST
            END IF

            tTVInsert.hParent = hNode

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))

            ' Make sure that the selected node (parent of the new child) has it's children member of it's TV_ITEM set
            tTVItem.mask = %TVIF_CHILDREN OR %TVIF_HANDLE
            tTVItem.hItem = hNode
            tTVItem.cChildren = 1

            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
          END IF

        CASE %IDC_BUTTON28
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new item as the last sibling of the selected node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the parent of the selected node
            hParent = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PARENT, hNode)

            tTVInsert.hParent      = hParent' It will have the same parent as the selected node
            tTVInsert.hInsertAfter = %TVI_LAST     ' Insert it as the last item

            NewText = "New last item Node "+TIME$

            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 0
            tTVInsert.Item.Item.iSelectedImage = 1
            tTVInsert.Item.Item.lParam = RND(1, 10000)

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))
          END IF


        CASE %IDC_BUTTON29
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new child node of the selected parent after the specified as the last child node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Insert a new child node as the first child of the selected node
            NewText = "Child Last "+TIME$
            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 2
            tTVInsert.Item.Item.iSelectedImage = 3
            tTVInsert.Item.Item.lParam = RND(1, 10000)

            tTVInsert.hInsertAfter = %TVI_LAST
            tTVInsert.hParent = hNode

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))

            ' Make sure that the selected node (parent of the new child) has it's children member of it's TV_ITEM set
            tTVItem.mask = %TVIF_CHILDREN OR %TVIF_HANDLE
            tTVItem.hItem = hNode
            tTVItem.cChildren = 1

            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
          END IF

        CASE %IDC_BUTTON30
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the current selected node to toggle bold text on and off

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the current bold state of this item
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_STATE
            tTVItem.statemask = %TVIS_BOLD
            tTVItem.hItem = hNode
            SendMessage(hTree, %TVM_GETITEM, 0 , BYVAL VARPTR(tTVItem))

            IF (tTvItem.State AND %TVIS_BOLD) = %TVIS_BOLD THEN
              ' Set the item text to not bold
              tTVItem.mask = %TVIF_HANDLE OR %TVIF_STATE
              tTVItem.statemask = %TVIS_BOLD
              tTVItem.state = tTVItem.state AND NOT %TVIS_BOLD
              tTVItem.hItem = hNode
              sendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
            ELSE
              ' Set the item text to bold
              tTVItem.mask = %TVIF_HANDLE OR %TVIF_STATE
              tTVItem.statemask = %TVIS_BOLD
              tTVItem.state = %TVIS_BOLD
              tTVItem.hItem = hNode
              sendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
            END IF
          END IF

        CASE %IDC_BUTTON31
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the bold state of the currently selected node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the current bold state of this item
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_STATE
            tTVItem.statemask = %TVIS_BOLD
            tTVItem.hItem = hNode
            SendMessage(hTree, %TVM_GETITEM, 0 , BYVAL VARPTR(tTVItem))

            IF (tTvItem.State AND %TVIS_BOLD) = %TVIS_BOLD THEN
              ? "This node's text is bold"
            ELSE
              ? "This node's text is not bold"
            END IF

          END IF

        CASE %IDC_BUTTON32
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Is the selected node expanded

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the current bold state of this item
            tTVItem.mask = %TVIF_HANDLE OR %TVIF_STATE
            tTVItem.statemask = %TVIS_EXPANDED
            tTVItem.hItem = hNode
            SendMessage(hTree, %TVM_GETITEM, 0 , BYVAL VARPTR(tTVItem))

            IF (tTvItem.State AND %TVIS_EXPANDED) = %TVIS_EXPANDED THEN
              ? "This node is expanded"
            ELSE
              ? "This node is not expanded"
            END IF
          END IF

        CASE %IDC_BUTTON33
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the current line color
            SendMessage(hTree, %TVM_SETLINECOLOR, 0, %RED)
          END IF

        CASE %IDC_BUTTON34
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the current line color
            i = SendMessage(hTree, %TVM_GETLINECOLOR, 0, 0)

            ? "The line color is "+HEX$(i)
          END IF
        CASE %IDC_BUTTON35
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the current text color
            SendMessage(hTree, %TVM_SETTEXTCOLOR, 0, %MAGENTA)
          END IF

        CASE %IDC_BUTTON36
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the current text color
            i = SendMessage(hTree, %TVM_GETTEXTCOLOR, 0, 0)

            ? "The text color is "+HEX$(i)
          END IF

        CASE %IDC_BUTTON37
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Select an node in the treeview
            ' In this example we will select the child of the selected node
            ' if there is no child then we will select the parent
            ' If there is no parent then we will select the next sibling
            ' If there is no sibling then just select the root

            ' Get the Selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the child of the Selected node
            hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CHILD, hNode)

            ' If no child node then get the parent
            IF hChildNode=0 THEN
              hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PARENT, hNode)
            END IF

            ' If no parent node then get the sibling
            IF hChildNode=0 THEN
              hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_NEXT, hNode)
            END IF

            ' If no siblings then get the root node
            IF hChildNode=0 THEN
              hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_ROOT, 0)
            END IF

            SendMessage(hTree, %TVM_SELECTITEM, %TVGN_CARET, hChildNode)
          END IF


        CASE %IDC_BUTTON38
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Ensure that a node in the treeview
            ' In this example we will ensure the child of the selected node is visible
            ' if there is no child then we will ensure the parent is visible
            ' If there is no parent then we will ensure the next sibling is visible
            ' If there is no sibling then just ensure the root is visible

            ' Get the Selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Get the child of the Selected node
            hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CHILD, hNode)

            ' If no child node then get the parent
            IF hChildNode=0 THEN
              hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_PARENT, hNode)
            END IF

            ' If no parent node then get the sibling
            IF hChildNode=0 THEN
              hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_NEXT, hNode)
            END IF

            ' If no siblings then get the root node
            IF hChildNode=0 THEN
              hChildNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_ROOT, 0)
            END IF

            SendMessage(hTree, %TVM_ENSUREVISIBLE, 0, hChildNode)
          END IF

        CASE %IDC_BUTTON39
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Set the item height for all items in the treeview
            ' It is possible using the XP Look and Feel Resource fix that
            ' uses common controls version 6.0 to set each items height idividually

            i = VAL(INPUTBOX$("Enter the height of items in pixels"+$CRLF+_
                              "There is NO error checking!"+$CRLF+_
                              "-1 is the default height", _
                              "Item Height"))

            SendMessage(hTree, %TVM_SETITEMHEIGHT, i, 0)
          END IF

        CASE %IDC_BUTTON40
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Retreive the item height
            i = SendMessage(hTree, %TVM_GETITEMHEIGHT, 0, 0)
            ? "The Item Height is "+FORMAT$(i)+" pixels"
          END IF

        CASE %IDC_BUTTON41
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Sort the children of the selected node

            ' Get the Selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            SendMessage(hTree, %TVM_SORTCHILDREN, 0, hNode)
          END IF

        CASE %IDC_BUTTON42
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Sort the children of the selected sub using a user defined sorting callback

            ' Get the Selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            tTVSortCB.hParent = hNode
            tTVSortCB.lpfnCompare = CODEPTR(CompareFunc)
            tTVSortCB.lParam = %null ' user defined data passed to the compare function

            SendMessage(hTree, %TVM_SORTCHILDRENCB, 0, BYVAL VARPTR(tTVSortCB))
          END IF


        CASE %IDC_BUTTON43
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Get the LParam of the selected node

            ' Get the Selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            tTVItem.mask = %TVIF_HANDLE OR %TVIF_PARAM
            tTVItem.hItem = hNode

            SendMessage(hTree, %TVM_GETITEM, 0, BYVAL VARPTR(tTVItem))

            ? "The LParam for this item is"+STR$(tTVItem.lParam)
          END IF

        CASE %IDC_BUTTON44
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            i = VAL(INPUTBOX$("Please enter a lParam value", "Get lParam"))

            ' Get the Selected node
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            tTVItem.mask = %TVIF_HANDLE OR %TVIF_PARAM
            tTVItem.hItem = hNode
            tTVItem.lParam = i

            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
          END IF

        CASE %IDC_BUTTON45
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            ' Insert a new child node in alphabetical order based on the selected parent node

            ' Get the handle of the selected item(node)
            hNode = SendMessage(hTree, %TVM_GETNEXTITEM, %TVGN_CARET, 0)

            ' Insert a new child node as the first child of the selected node
            NewText = "Child Sort "+TIME$
            tTVInsert.Item.Item.mask       = %TVIF_TEXT OR %TVIF_IMAGE OR %TVIF_SELECTEDIMAGE OR %TVIF_PARAM
            tTVInsert.Item.Item.pszText    = STRPTR(NewText)
            tTVInsert.Item.Item.cchTextMax = LEN(NewText)
            tTVInsert.Item.Item.iImage     = 2
            tTVInsert.Item.Item.iSelectedImage = 3
            tTVInsert.Item.Item.lParam = RND(1, 10000)
            tTVInsert.hParent = hNode
            tTVInsert.hInsertAfter = %TVI_SORT

            SendMessage(hTree, %TVM_INSERTITEM, 0, BYVAL VARPTR(tTVInsert))

            ' Make sure that the selected node (parent of the new child) has it's children member of it's TV_ITEM set
            tTVItem.mask = %TVIF_CHILDREN OR %TVIF_HANDLE
            tTVItem.hItem = hNode
            tTVItem.cChildren = 1

            SendMessage(hTree, %TVM_SETITEM, 0, BYVAL VARPTR(tTVItem))
          END IF

      END SELECT

    CASE %WM_NOTIFY
      TVnm = CBLPARAM

      SELECT CASE @TVnm.hdr.code

        CASE %NM_CLICK
          IF @TVnm.hdr.idFrom = %ID_TVIEW THEN
            ' This will ensure that when the user either clicks the checkbox or the
            ' buttons (+/-) the item/node will be selected. You get a strange flashing
            ' experience if you do not do this, comment out this code and then use a
            ' checkbox or the buttons and see what occurs. (found this code on MSDN)

            dwPos = GetMessagePos          ' Get the mouse position
            TVht.pt.x = LO(WORD, dwPos)    ' Store the mouse x pos in the hittest udt
            tvht.pt.y = HI(WORD, dwPos)    ' Store the mouse y pos in the hittest udt
            MapWindowPoints(%HWND_DESKTOP, @TVnm.hdr.hwndFrom, TVht.pt, 1)

            ' Get the TreeView item/node returned in the hittest udt member of hItem
            SendMessage(hTree, %TVM_HITTEST, 0, BYVAL VARPTR(TVht))

            ' Select the TreeView item/node that was clicked on (returned above)
            'TreeView_SelectItem(hTree, TVHt.hItem)
            SendMessage(hTree, %TVM_SELECTITEM, %TVGN_CARET, TVht.hItem)
          END IF

        CASE %TVN_BEGINLABELEDIT
          ' Get the handle of the TreeView edit control
          hTVEdit = Treeview_GetEditControl(hTree)

          ' Get the text in the edit control (original text)
          CONTROL GET TEXT hTree, GetDlgCtrlID(hTVEdit) TO oldtext

          ' Limit the edit control to 25 characters
          CONTROL SEND hTree, GetDlgCtrlID(hTVEdit), %EM_LIMITTEXT, 25, 0

        CASE %TVN_ENDLABELEDIT
          ' Return 1 to use the new text or 0 to use the original text
          ' This is useful when you subclass the TreeView edit box and
          ' catch the ESCape key to cancel the edit, you would then call
          ' TreeView_EndEditLabelNow which ends the editing and with a flag
          ' varaible set to 0 and then set FUNCTION = flagVariable or something
          ' like that.

          ' Get the handle of the TreeView edit control
          hTVEdit = Treeview_GetEditControl(hTree)

          ' Get the text in the edit control (original text)
          CONTROL GET TEXT hTree, GetDlgCtrlID(hTVEdit) TO NewText

          ? "You changed the text from "+OldText+" to "+NewText

          FUNCTION = 1

      END SELECT
  END SELECT

END FUNCTION

FUNCTION CompareFunc(BYVAL lParam1 AS LONG, BYVAL lParam2 AS LONG, BYVAL lParamSort AS LONG) AS LONG
  ' lParam1 and lParam2 are the lParam members of the TV_ITEM UDT
  ' I guess if you want a search based on the pszText member instead you have two choices
  ' One would be to store the handle to the node in the lParam then you could get the text this way
  ' Or you could iterate through each node until you find the node with this lParam

  IF lParam1>lParam2 THEN
    FUNCTION = 1
  ELSEIF lParam1<lParam2 THEN
    FUNCTION = -1
  ELSE
    FUNCTION = 0
  END IF

END FUNCTION


FUNCTION BuildImageList AS DWORD
  LOCAL hbmp AS DWORD
  LOCAL hIL  AS DWORD

  hIL = ImageList_Create(32, 32, %ILC_COLOR32, 2, 1)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 100, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 101, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 102, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 103, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 104, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 105, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 106, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  hBmp = LoadImage(GetModuleHandle(BYVAL %NULL), BYVAL 107, %IMAGE_ICON, 0, 0, _
                       %LR_DEFAULTSIZE OR %LR_COPYFROMRESOURCE OR %LR_LOADTRANSPARENT OR %LR_LOADMAP3DCOLORS  )

  ImageList_AddIcon(hIL, hBmp)

  FUNCTION = hIL

END FUNCTION

SUB GetTVStyles
  LOCAL hDlg  AS DWORD

  DIALOG NEW 0, "Options", 64, 42, 494, 250, TO hDlg
  CONTROL ADD CHECKBOX, hDlg, %ID_HASLINES, "%TVS_HASLINES", 15, 30, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASLINESATROOT, "%TVS_LINESATROOT (%TVS_HASLINES MUST BE SELECTED)", 15, 40, 280, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASBUTTONS, "%TVS_HASBUTTONS (%TVS_LINESATROOT MUST BE SELECTED)", 15, 50, 255, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASSHOWSELALWAYS, "%TVS_SHOWSELALWAYS", 15, 60, 110, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASEDITLABELS, "%TVS_EDITLABELS", 15, 70, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASCHECKBOXES, "%TVS_CHECKBOXES", 15, 80, 100, 10
  CONTROL ADD FRAME,    hDlg, %IDC_FRAME1, "Styles", 5, 15, 305, 170
  CONTROL ADD LABEL,    hDlg, %IDC_LABEL1, "Select the styles you want the TreeView created with", 5, 5, 175, 10
  CONTROL ADD BUTTON,   hDlg, %IDOK, "DONE", 439, 230, 50, 15
  DIALOG  SEND          hDlg, %DM_SETDEFID, %IDOK, 0
  CONTROL ADD CHECKBOX, hDlg, %ID_HASFULLROWSELECT, "%TVS_FULLROWSELECT (CANNOT BE USED WITH  %TVS_HASLINES)", 15, 90, 270, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASINFOTIP, "%TVS_INFOTIP", 15, 100, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASNONEVENHEIGHT, "%TVS_NONEVENHEIGHT", 15, 110, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASNOTOOLTIPS, "%TVS_NOTOOLTIPS", 15, 120, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASRTLREADING, "%TVS_RTLREADING", 15, 130, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASSINGLEEXPAND, "%TVS_SINGLEEXPAND", 15, 140, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASTRACKSELECT, "%TVS_TRACKSELECT", 15, 150, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASNOHSCROLL, "%TVS_NOHSCROLL ", 15, 160, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASNOSCROLL, "%TVS_NOSCROLL ", 15, 170, 100, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASAUTOSCROLL, "%TVS_EX_AUTOHSCROLL", 325, 30, 110, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASDIMMEDCHECKBOXES, "%TVS_EX_DIMMEDCHECKBOXES", 325, 40, 130, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASDOUBLEBUFFER, "%TVS_EX_DOUBLEBUFFER ", 325, 50, 110, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASDRAWIMAGESYNC, "%TVS_EX_DRAWIMAGEASYNC ", 325, 60, 130, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASEXCLUSIONCHECKBOXES, "%TVS_EX_EXCLUSIONCHECKBOXES", 325, 70, 150, 10
  CONTROL ADD FRAME,    hDlg, %IDC_FRAME2, "Extended Styles", 315, 16, 175, 170
  CONTROL ADD CHECKBOX, hDlg, %ID_HASFADEINOUTEXPANDOS, "%TVS_EX_FADEINOUTEXPANDOS ", 325, 80, 145, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASNOINDENTSTATE, "%TVS_EX_NOINDENTSTATE", 325, 90, 145, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASPARTIALCHECKBOXES, "%TVS_EX_PARTIALCHECKBOXES ", 325, 100, 155, 10
  CONTROL ADD CHECKBOX, hDlg, %ID_HASRICHTOOLTIP, "%TTVS_EX_RICHTOOLTIP ", 325, 110, 100, 10
  CONTROL ADD LABEL,    hDlg, -1, "The Extended TreeView Styles are for Windows Vista only. The older SDK Help files make no mention of " + _
    "these and testing shows they do not work on XP using version 6 of the common controls. I found several mentions for most of these Extended " + _
    "Styles that they are for Vista only. Also they must be set after the TreeView is created by sending a TVM_SETEXTENDEDSTYLE Message and MSDN " + _
    "says this message is for Vista only. ", 5, 190, 485, 35, %WS_CHILD OR %WS_VISIBLE OR %WS_BORDER OR %SS_LEFT, %WS_EX_STATICEDGE OR %WS_EX_LEFT _
    OR %WS_EX_LTRREADING

  CONTROL SET CHECK hdlg, %ID_HASLINES, 1
  CONTROL SET CHECK hdlg, %ID_HASLINESATROOT, 1
  CONTROL SET CHECK hdlg, %ID_HASSHOWSELALWAYS, 1
  CONTROL SET CHECK hdlg, %ID_HASEDITLABELS, 1
  CONTROL SET CHECK hdlg, %ID_HASCHECKBOXES, 1
  CONTROL SET CHECK hdlg, %ID_HASBUTTONS, 1

  DIALOG SHOW MODAL hDlg, CALL StylesDlgProc
END SUB

CALLBACK FUNCTION StylesDlgProc
  LOCAL i AS LONG

  SELECT CASE AS LONG CBMSG

    CASE %WM_COMMAND
      ' Process control notifications
      SELECT CASE AS LONG CBCTL
        CASE %IDOK
          IF CBCTLMSG = %BN_CLICKED OR CBCTLMSG = 1 THEN
            CONTROL GET CHECK CBHNDL, %ID_HASLINES TO i
            IF i THEN TVStyles = %TVS_HASLINES

            CONTROL GET CHECK CBHNDL, %ID_HASLINESATROOT TO i
            IF i THEN TVStyles = TVStyles OR %TVS_LINESATROOT

            CONTROL GET CHECK CBHNDL, %ID_HASBUTTONS TO i
            IF i THEN TVStyles = TVStyles OR %TVS_HASBUTTONS

            CONTROL GET CHECK CBHNDL, %ID_HASSHOWSELALWAYS TO i
            IF i THEN TVStyles = TVStyles OR %TVS_SHOWSELALWAYS

            CONTROL GET CHECK CBHNDL, %ID_HASEDITLABELS TO i
            IF i THEN TVStyles = TVStyles OR %TVS_EDITLABELS

            CONTROL GET CHECK CBHNDL, %ID_HASCHECKBOXES TO i
            IF i THEN TVStyles = TVStyles OR %TVS_CHECKBOXES

            CONTROL GET CHECK CBHNDL, %ID_HASFULLROWSELECT TO i
            IF i THEN TVStyles = TVStyles OR %TVS_FULLROWSELECT
            DIALOG END CBHNDL, TVStyles
          END IF

      END SELECT
  END SELECT
END FUNCTION

Here is the RC file. Use your own icons...

#include "resource.h"

#define IDI_DIR1CLOSED   100
#define IDI_DIR1OPEN     101
#define IDI_DIR2CLOSED   102
#define IDI_DIR2OPEN   103
#define IDI_CDDIS   104
#define IDI_CDEND  105
#define IDI_DIR3CLOSE  106
#define IDI_DIR3OPEN   107



IDI_DIR1CLOSED    ICON    DISCARDABLE   "Dirocty1.ico"
IDI_DIR1OPEN      ICON    DISCARDABLE   "DirOpen.ico"
IDI_DIR2CLOSED    ICON    DISCARDABLE   "RedDirocty.ico"
IDI_DIR2OPEN      ICON    DISCARDABLE   "RedDirOpen.ico"
IDI_CDDIS         ICON    DISCARDABLE   "CdDrive.ico"
IDI_CDEND         ICON    DISCARDABLE   "CdBurn.ico"
IDI_DIR3CLOSE     ICON    DISCARDABLE   "YellowDirOpen.ico"
IDI_DIR3OPEN      ICON    DISCARDABLE   "YellowDirocty.ico"


1 24 "xptheme.xml"

[Chris Holbrook Member Find all posts View Profile Close Chris Holbrook]

Thanks Ian & Steve for the above, which has been useful, though I have not yet solved my initial problems.



Funny thing, what put me off looking at multiple selections was finding something very like the disclaimer in the eg which Steve posted above:

' Not really sure why this works but it does
' MSDN says that that the return value is a unsigned int but then it says
' it can return a -1.
' I found the code below on several sites but no one explains why it works
'
' Found this by accident in the Win32 SDK:
' The INDEXTOSTATEIMAGEMASK macro prepares the index of a state image so that a tree-view
' control or list-view control can use the index to retrieve the state image for an item.
'
' This makes sense that it converts the imagemask to an imagelist index - the checkbox
' as actuall two images one checked and one unchecked.

Now if I had found that I would have said to myself "fools rush in..." but coming from Steve it looks more like leadership. Who wrote that code BTW Steve? no attribution or copyright/disclaimer.

Slightly off my original message, but here's a scrap of code (as opposed to a compileable example) which will call a function for each checked item in a listview. The Walkies function is what does it, the Our_TV_itemProc is an example of a called function, and the last line is an example of how to call walkies. All my own work, so treat with caution!

'------------------------------------------------------------------------------
' function prototype for walkies "onHit" fn
' first param is treeview window handle
' second param is pointer to TV_ITEM
DECLARE FUNCTION TVfnPrototype  ( hTVWnd AS DWORD, BYVAL pTV AS TV_ITEM PTR) AS LONG
'------------------------------------------------------------------------------
FUNCTION Our_TVITEM_proc ( hTVWnd AS DWORD, BYVAL pTV AS TV_ITEM PTR) AS LONG
    LOCAL sz AS ASCIIZ*256
    LOCAL TreeItem AS TV_ITEM
    LOCAL pTVITEM AS TV_ITEM PTR

    TreeItem = @pTV
    pTVITEM = VARPTR(TreeItem)
    TreeItem.mask = %TVIF_TEXT OR %TVIF_STATE OR %TVIF_HANDLE OR %TVIF_IMAGE
    TreeItem.stateMask = %TVIS_STATEIMAGEMASK
    TreeItem.cchTextMax = SIZEOF(sz)
    TreeItem.psztext    = VARPTR(sz)
    sendmessage hTVWnd, %TVM_GETITEM, 0, pTVITEM ' get item
    ' this line sends the TV item name to a listbox
    sendmessage geditWnd, %LB_ADDSTRING, 0, VARPTR(sz) ' send it on, prefixed by parent id
END FUNCTION
'------------------------------------------------------------------------------
' walk tree, execute OnHitfn when a checked item is encountered
' params are treeview control window handle,
'            OnHitFn address
'            TV item handle
'            parent identifier (text of parent TV item)
'
FUNCTION walkies ( hTVWnd AS DWORD, OnHitfn AS DWORD, hTVItem AS DWORD, BYVAL pszParent AS ASCIZ PTR  ) AS LONG
    LOCAL sz AS ASCIZ * 256
    LOCAL hti AS tv_item PTR
    LOCAL treeItem AS TV_ITEM
    LOCAL pTVITEM AS tv_item PTR
'    local lCountofItems as long
    LOCAL i AS LONG
    LOCAL dwOnHitFn AS DWORD
    
    TreeItem.HItem = hTVItem
    pTVITEM = VARPTR(TreeItem)
    WHILE TreeItem.HItem <> %NULL
        TreeItem.mask = %TVIF_STATE OR %TVIF_HANDLE '%TVIF_TEXT or %TVIF_STATE or %TVIF_HANDLE OR %TVIF_IMAGE
        TreeItem.stateMask = %TVIS_STATEIMAGEMASK
        sendmessage hTVWnd, %TVM_GETITEM, 0, pTVITEM ' get item
        ' is it checked?
        i = TreeItem.state
        SHIFT RIGHT i, 12
        IF i = 2 THEN
            IF @pszParent <> "" THEN sz = @pszParent + "." + sz
            CALL DWORD OnHitFn USING TVfnPrototype (hTVWnd, pTVITEM)
            CALL walkies(hTVWnd, OnHitFn, TreeView_GetChild(hTVwnd, TreeItem.hitem), VARPTR(sz))
        END IF
        TreeItem.HItem = Treeview_GetNextSibling(hTVWnd, TreeItem.hItem)
    WEND
END FUNCTION
'-----------------------------------------------------------------------
' example of how walkies might be called, given the TV window and the name of the function to call when a checked item is found.

     walkies ( hTVWnd, CODEPTR(Our_TVITEM_proc), TreeView_GetRoot( hTVWnd), BYVAL %null)

[Steve Rossell Member Find all posts View Profile Close Steve Rossell]

Now if I had found that I would have said to myself "fools rush in..." but coming from Steve it looks more like leadership. Who wrote that code BTW Steve? no attribution or copyright/disclaimer.

I wrote this code above and I am not saying that it's right and was just trying to make and example of everything a treeview can do. As you can tell from my notes, I was not really sure about this when I wrote the code. I used this as a learning experience to understand better all the routines that exist for a treeview. Use this code as starting point - I am certainly not saying that everything I did in this code is correct.

[Ian Cairns Member Find all posts View Profile Close Ian Cairns]

Thanks for the work, Steve.

regards, Ian

[Chris Holbrook Member Find all posts View Profile Close Chris Holbrook]

I wrote this code above...

I'm very glad that you did, many thanks for posting it.

Do you have any other topics lined up for this sort of treatment?

BTW I put my tree walking code up on the Source Code Forum here

[Michael Mattias Member Find all posts View Profile Close Michael Mattias]

>Do you have any other topics lined up for this sort of treatment?

One of the Petzold programs (which I know have been converted to PB and I'm pretty sure are here "somewhere") is called "gadgets" and uses one of just about every possible control.

[Chris Holbrook Member Find all posts View Profile Close Chris Holbrook]

Just changed the code on the Source Code Forum to remove spurios #INCLUDE statements, no non-standard includes are required to run this code under PBWin 8.04. It's here

[Gary Beene Member Find all posts View Profile Close Gary Beene]

How to change the icon in a treeview node

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