Application get Crash when lose focus in mfc

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Hello everyone
I am facing some problem in

C++

CallWindowProc(oldWndProc, hWnd, nMsg, wParam, lParam)

where nMsg = 28
i didnt get which type of this message n why it occures whenever application lose focus..
Thanx in advance.. n mery X'mas n happy new year...

Posted 25-Dec-11 23:09pm

shashankacharya

Updated 25-Dec-11 23:12pm

Mehdi Gholam

v2

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2 solutions

Solution 2

A crash is often produced when your program attempts to access a protected memory location.

Run your program in the debugger and make it crash.
When it crashes, view the call stack and see what code is executing when it crashes.

Because MFC apps are inherently multi-threaded, the thread that crashes may not be your main thread. If this is the case, open the thread window in the debugger and find your main thread and see what code it was executing.

Posted 27-Dec-11 5:57am

JackDingler

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chandanadhikari 28-Dec-11 2:55am

hi ,
JackDingler has shown you the way.Try to debug and when your application crashes it will point you to the line where some memory access violation is taking place, you might get some error code --do some googling with that error code.Also Google for this issue --just in case it might be a known bug for the MFC verion you are using.

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Lactoferrin · Accepted Answer · 2011-12-25T23:27:00

Solution 1

28(decimal)corresponds to WM_ACTIVATEAPP
it is sent whenever your application's window is being activated or deactivated

Posted 25-Dec-11 23:27pm

Lactoferrin

Comments

shashankacharya 26-Dec-11 5:34am

hey thanx for ur answer...
whenevr i clicked on task bar application get crashed... Can u tell me about it..??

Lactoferrin 27-Dec-11 21:45pm

Does it crash when calling CallWindowProc?
maybe there is error in oldWndProc