Deleteallitems for treeview

[Edwin Knoppert]

TVM_DELETEITEM

In the helpfile it's cleary stated i should use TVI_ROOT as param but long time ago i had a GPF on this and i always used 0 and seems to work well.
To do the right thing.. is TVI_ROOT a valid option or are there reasons to keep using 0?

Maybe this be related to Windows 98 or an older PB compiler possibly having TVI_ROOT not declared being a DWORD constant or so?
Would like to end this doubt.

[Chris Holbrook]

Would like to end this doubt.

Wish I could help, but having tangled with this one before I now destroy the TV window and recreate it, which I assume allows windows to clean up its own mess. Do I assume too much?

[Edwin Knoppert]

That's a pretty hard thing to do.
No i write custom controls and on delete all i need to handle the objects stored in each item.
From now on i keep using TVI_ROOT as it should.

[Michael Mattias]

COMMCTRL.INC 27 Oct 2003 (what shipped with PB/WIN 9.0)

%TVI_ROOT               = &HFFFF0000???
%TVI_FIRST              = &HFFFF0001???
%TVI_LAST               = &HFFFF0002???
%TVI_SORT               = &HFFFF0003???

commctrl.h

                                                                           *
* commctrl.h - - Interface for the Windows Common Controls                    *
*                                                                             *
* Version 1.2                                                                 *
*                                                                             *
* Copyright (c) 1991-1998, Microsoft Corp.      All rights reserved.          *
*                                                                             *


#define TVI_ROOT                ((HTREEITEM)(ULONG_PTR)-0x10000)
#define TVI_FIRST               ((HTREEITEM)(ULONG_PTR)-0x0FFFF)
#define TVI_LAST                ((HTREEITEM)(ULONG_PTR)-0x0FFFE)
#define TVI_SORT                ((HTREEITEM)(ULONG_PTR)-0x0FFFD)