CommCtrl and ???

[Semen Matusovski]

TVI_ROOT = &HFFFF0000???

Well ... Test Hex$(TVI_ROOT)
I replaced ??? here and in another places to & and all is Ok.

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[Tom Hanlin]

Eh... what?

%TVI_ROOT is a constant for a handle type and, thus, is properly defined
as a DWORD quantity, &HFFFF0000???. In most cases, it is also safe to
define it as the equivalent LONG quantity, &HFFFF0000&. The only case
where you might have a problem with this is when doing a direct comparison
of the values (say, in an IF..THEN construct).


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Tom Hanlin
PowerBASIC Staff

[Semen Matusovski]

Originally posted by Tom Hanlin:
The only case where you might have a problem with this is when doing a direct comparison
of the values (say, in an IF..THEN construct).

Tom --
SendMessage (TreeView_DeleteAllItems)



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[Tom Hanlin]

Your point is not clear. Perhaps you could be less terse?

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Tom Hanlin
PowerBASIC Staff

[Semen Matusovski]

Tom --
Your reaction talks that you didn't test Hex$(%TVI_ROOT)
Compiler SHOULD produce the same image for &HFFFF0000??? and &HFFFF0000&, but ...

#Compile Exe
#Register None
#Dim All         
Function PbMain
   MsgBox Hex$(&HFFFF0000???),, Hex$(&HFFFF0000&)
End Function

Additional test (what happends with TreeView_DeleteAllItems)

   #Compile Exe
   #Register None
   #Dim All
   #Include "Win32Api.Inc"

   %TVI_ROOT               = &HFFFF0000???
   
   CallBack Function DlgProc
      Select Case CbMsg
         Case %WM_USER + 1
            SetWindowText CbHndl, "Should be " + Hex$(CbWparam) + " BUT RECEIVED " + Hex$(CbLparam)
      End Select
   End Function

   Function PbMain
      Local hDlg As Long
      Dialog New 0, "Palette",,, 400, 100, %WS_SYSMENU Or %WS_CAPTION To hDlg
      PostMessage hDlg, %WM_USER + 1, &HFFFF0000&, %TVI_ROOT
      Dialog Show Modal hDlg Call DlgProc
   End Function

What is interesting that

Dim a As Dword
a = &HFFFF0000???

works correctly.


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[This message has been edited by Semen Matusovski (edited October 26, 2000).]

[Jules Marchildon]

semen, give these a look over...

http://www.powerbasic.com/support/pb...ead.php?t=1811

http://www.powerbasic.com/support/pb...ead.php?t=1787

regards, jules

[Tom Hanlin]

Ah, I see. That's what we call a "bug". It's been fixed for the
next update to the compiler.

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Tom Hanlin
PowerBASIC Staff