SendMessage from EnumChildWindowProc is not responding.

[mbu]

Hello O'Great Ones,
I have problem with SendMessage() from inside the EnumChildWindowsProc.

*From my Form1 Code I called (I have hParent handle already)

Call EnumChildWindows(hParent, AddressOf EnumChildProc, &H0)

And in my EnumChildProc (in the module) I have
lResult = SendMessage(hChild, WM_SETTEXT, ByVal 0&, ByVal SentText)
MsgBox hChild
MsgBox lResult

But that lResult always return 0 (zero) though the hChild is a valid handle that I want.
Where am I doing it wrong? H-e-l-p.

 

[vb5prgrmr]

You need a handle to the ChildWindow and not the childprocess if I remember correctly.

Good Luck

 

[mbu]

The SendMessage() command line is place after the hChild (the handle of child window which happens to be a textbox)is determined.

Something is very strange. This is the first time I am programing in API and I can't see why a callback function cannot respond a SendMessage().

 

[strongm]

How is SendMessage declared?

 

[mbu]

Private Declare Function SendMessage Lib "user32" _
Alias "SendMessageA" _
(ByVal hwnd As Long, _
ByVal wMsg As Long, _
ByVal wParam As Long, _
lParam As Any) As Long

In the module where the "EnumChildProc" is.