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Dear Sir,
I get a error message while program exit, As bellow,
-------------------------------------------------------------------------------------------
Unhandled exception at 0x009ea9e1 (ProfUIS264ud.dll) in ProfUIS_Controls-ud.exe: 0xC0000005: Access violation reading location 0x027c62f4.
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I have try to reduce the one class members of my program , the message is not appear anymore.
so, is there constrain for class members number ?

Dear Suhai,
My program is dialog-based , and got a error message as below,
’CExtHookSink::RemoveAllWndHooks’ : illegal call of non-static member function

Dear Suhai,
the problem still persists.
by the way, the program is broken in file "afxtempl.h"
AFX_INLINE INT_PTR CArray<TYPE, ARG_TYPE>::GetSize() const
    { return m_nSize; }

Would you send us your project so we can check it on our side?

Sorry I forgot, if you are using the ProfUIS customization subsystem, you need to add another line as well:
// this line is needed if the CMainFrame class is derived from the CExtCustomizeSite class
CExtCustomizeSite::RemoveAllWndHooks();
//
m_wndMenuBar.RemoveAllWndHooks();
... // other codes of CMainFrame::DestroyWindow


the call stack is below,

>    ProfUIS264ud.dll!CArray<CExtHookSink *,CExtHookSink *>::GetSize() Line 279 + 0x11 bytes    C++
    ProfUIS264ud.dll!CExtHookSink::HookChains_t::HookChainsWindowProc(unsigned int nMessage=0x00000082, unsigned int & wParam=0x00000000, long & lParam=0x00000000) Line 239 + 0xb bytes    C++
    ProfUIS264ud.dll!CExtHookSink::HookChains_t::g_HookWndProc(HWND__ * hWnd=0x01a015fe, unsigned int nMessage=0x00000082, unsigned int wParam=0x00000000, long lParam=0x00000000) Line 287 + 0x14 bytes    C++
    user32.dll!77d18734()     
    [Frames below may be incorrect and/or missing, no symbols loaded for user32.dll]    
    user32.dll!77d1d05b()     
    user32.dll!77d1b4c0()     
    user32.dll!77d1dabd()     
    ntdll.dll!7c92eae3()     
    user32.dll!77d1daf6()     
    mfc80ud.dll!CWnd::DestroyWindow() Line 993 + 0xd bytes    C++
    ProfUIS264ud.dll!CExtResDlg::_DoModalImpl() Line 6080 + 0xf bytes    C++
    ProfUIS264ud.dll!CExtResDlg::DoModal() Line 6001 + 0x12 bytes    C++
    ProfUIS_Controls-ud.exe!CMainApp::InitInstance() Line 83 + 0xe bytes    C++
    mfc80ud.dll!AfxWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, wchar_t * lpCmdLine=0x00020ac8, int nCmdShow=0x00000001) Line 37 + 0xd bytes    C++
    ProfUIS_Controls-ud.exe!wWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, wchar_t * lpCmdLine=0x00020ac8, int nCmdShow=0x00000001) Line 29    C++
    ProfUIS_Controls-ud.exe!__tmainCRTStartup() Line 578 + 0x35 bytes    C
    ProfUIS_Controls-ud.exe!wWinMainCRTStartup() Line 403    C
    kernel32.dll!7c816fd7()     

Support’s answer in another thread about this:
Please add the following line at the very top of CMainFrame::DestroyWindow() and let us know if the problem persits
m_wndMenuBar.RemoveAllWndHooks();

I doubt there is a constraint for number of class members. It would help a lot if you could post the call stack when the exception occurs.