VC++ application hangs while changing language using short cut keys (Left ALT + SHIFT)

[EDN Admin]

<span class="fixed_width" style="font-family:Courier,Monospaced Hello<br/> <br/> We have a Visual C++ application running in Windows XP. Our application will be become "Not Responding" on typing some characters in the dialog edit control and by simulatenously <span class="fixed_width" style="font-family:Courier,Monospaced changing the XP language(using shortcut key Left ALT + SHIFT) <br/> <span class="fixed_width" style="font-family:Courier,Monospaced <br/> On debugging the application in VS2008 i could found that the control is not returning from<br/> following MFC code <br/> <br/> LRESULT CWnd:efWindowProc(UINT nMsg, WPARAM wParam, LPARAM lParam)<br/> {<br/>     if (m_pfnSuper != NULL)<br/>  --->    return ::CallWindowProc(m_pfnSuper, m_hWnd, nMsg, wParam, lParam);<br/> <br/> Watch information <br/> -----------------------------<br/>         m_pfnSuper    0x7e43b3ec _EditWndProcA@16    long (HWND__ *, unsigned int, unsigned int, long)*<br/>         nMsg    80    unsigned int<br/>         wParam    1    unsigned int<br/>         lParam    135464979    long<br/> <br/> <span class="fixed_width" style="font-family:Courier,Monospaced Full Call stack information <br/> --------------------------------------------<br/> <br/>           ntdll.dll!_KiFastSystemCallRet@0()     <br/>      user32.dll!_NtUserMessageCall@28()  + 0xc bytes    <br/>      user32.dll!_EditWndProcA@16()  + 0xd5 bytes    <br/>      user32.dll!_InternalCallWinProc@20()  + 0x28 bytes    <br/>      user32.dll!_UserCallWinProcCheckWow@32()  + 0xb7 bytes    <br/>      user32.dll!_CallWindowProcAorW@24()  + 0x51 bytes    <br/>      user32.dll!_CallWindowProcA@20()  + 0x1b bytes    <br/> >    mfc90d.dll!CWnd:efWindowProcA(unsigned int nMsg=80, unsigned int wParam=1, long lParam=135464979)  Line 1043 + 0x20 bytes    C++<br/>      mfc90d.dll!CWnd::WindowProc(unsigned int message=80, unsigned int wParam=1, long lParam=135464979)  Line 1756 + 0x1c bytes    C++<br/>      mfc90d.dll!AfxCallWndProc(CWnd * pWnd=0x04c17f38, HWND__ * hWnd=0x00281598, unsigned int nMsg=80, unsigned int wParam=1, long lParam=135464979)  Line 240 + 0x1c bytes    C++<br/>      mfc90d.dll!AfxWndProc(HWND__ * hWnd=0x00281598, unsigned int nMsg=80, unsigned int wParam=1, long lParam=135464979)  Line 403    C++<br/>      mfc90d.dll!AfxWndProcBase(HWND__ * hWnd=0x00281598, unsigned int nMsg=80, unsigned int wParam=1, long lParam=135464979)  Line 441 + 0x15 bytes    C++<br/>      user32.dll!_InternalCallWinProc@20()  + 0x28 bytes    <br/>      user32.dll!_UserCallWinProcCheckWow@32()  + 0xb7 bytes    <br/>      user32.dll!_DispatchMessageWorker@8()  + 0xdc bytes    <br/>      user32.dll!_DispatchMessageA@4()  + 0xf bytes    <br/>      mfc90d.dll!AfxInternalPumpMessage()  Line 183    C++<br/>      mfc90d.dll!CWinThread:umpMessage()  Line 900    C++<br/>      mfc90d.dll!CWinThread::Run()  Line 629 + 0xd bytes    C++<br/>      mfc90d.dll!CWinApp::Run()  Line 865    C++<br/>      mfc90d.dll!AfxWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x00151f02, int nCmdShow=1)  Line 47 + 0xd bytes    C++<br/>      OurApplication.exe!WinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x00151f02, int nCmdShow=1)  Line 34    C++<br/>      OurApplication.exe!__tmainCRTStartup()  Line 578 + 0x35 bytes    C<br/>      OurApplication.exe!WinMainCRTStartup()  Line 403    C<br/>      kernel32.dll!_BaseProcessStart@4()  + 0x23 bytes    <br/> <br/> <br/> <span class="fixed_width" style="font-family:Courier,Monospaced Please help !<br/> <span class="fixed_width" style="font-family:Courier,Monospaced <br/> <span style="font-family:Courier,Monospaced Thanks in advance<br/> Harikrishnan<br/>

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