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UI thread problem

Posted on 2002-04-28
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Last Modified: 2013-11-20
Hi
  I am creating one user interface thread, which intern creates a dialog box.This dialog box is handling windows messages like WM_TIMER, WM_CREATE very well. Problem is arising when i am sending a user defined message. Message is being posted to the dialog box and the corresponding function is executing. But in the function its showing this as NULL and hWnd as ???. I am using PostMessage() to post message. I tried with PostThreadMessage, but no result. I replaced ON_MESSAGE WITH ON_THREAD_MESSAGE, but the problem persists.

One thing I am amazing is that why cant it deals with user defined messages, when it can handle Windows messages. I hope i get some help from u.
Thank u in anticipation.

regards,
bsr
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Question by:SrinivasaRao
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8 Comments
 
LVL 12

Expert Comment

by:migel
ID: 6974828
Hi!
Can you show declaration of the CustomMessage handler int the dialog class?
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Author Comment

by:SrinivasaRao
ID: 6976274
hi,

   The declaration of the handler function is :
LRESULT CALLBACK FunctionName( WPARAM, LPARAM );

I am using vc++ 6.0

bsr
0
 
LVL 12

Expert Comment

by:migel
ID: 6976524
Hi!
try remove CALLBACK modifiers for your handler
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LVL 16

Expert Comment

by:AlexNek
ID: 6978465
2 SrinivasaRao
Did you try
AFX_MANAGE_STATE(AfxGetStaticModuleState( ));
at the function begin

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Author Comment

by:SrinivasaRao
ID: 6979757
its working when the declaration is : afx_msg void functionname() .

But after execution of the method its throwing Access Violation Error!!!!

unable to trace the things:)

bsr
0
 
LVL 12

Accepted Solution

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migel earned 50 total points
ID: 6979893
it is just stack corruption
try redeclare your method as
afx_msg LRESULT FunctionName(WPARAM wParam, LPARAM lParam);
and rebuild all
0

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