Having problems with SetWindowText api

[bence.k]

Hello all!

I'm writing because I'm having some problems with the SetWindowText api
(Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA"
(ByVal hwnd As Long, ByVal lpString As String) As Long)

I know the handle, and have the string what i want to see in the title.
Here is the code part:
c = SetWindowText(hwnd, "string")

c should be a double which is not null, it is ok because c returns a
good value every time
but after that
the window's caption should be "string", but it's became empty, not
"string".

i tried another way too. It is the SendMessage function.

we have the handle and the string again, and there is the code:
c = SendMessage(hwnd, 12, vbNull, "string")

c returns 1 so it should be ok
but the caption's text not ok again. it not empty but contains only one
character a Chr(8). if i replace the "string" with a vbNullString then
the caption text is empty again.

How can i set the right text in the caption?

Thanks,

Bence (iecs)

 

[Mattias Sjögren]

I'm writing because I'm having some problems with the SetWindowText api

(Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA"
(ByVal hwnd As Long, ByVal lpString As String) As Long)

Make that

Declare Auto Function SetWindowText Lib "user32" (ByVal hwnd As
IntPtr, ByVal lpString As String) As Boolean


Mattias

 

[Chris Dunaway]

I'm writing because I'm having some problems with the SetWindowText api
(Declare Function SetWindowText Lib "user32" Alias "SetWindowTextA"
(ByVal hwnd As Long, ByVal lpString As String) As Long)

Your api declaration needs to be changed as Mattias already pointed
out. For additional information see here:

http://www.pinvoke.net/default.aspx/user32.SetWindowText