I am creating a view in my project which is a child class of CView.
class CBaseGLView : public CView In oncreate function I am checking it null or not as below:
int CBaseGLView::OnCreate(LPCREATESTRUCT lpCreateStruct) { if (CView::OnCreate(lpCreateStruct) == -1) return -1; m_hWnd = GetSafeHwnd(); if( ::IsWindow(m_hWnd)== NULL) { return 1; } m_pCDC= new CClientDC(this); m_hDC = m_pCDC->GetSafeHdc(); if (SetWindowPixelFormat()==FALSE) return 0; return 0; } When I am debugging with ApplicationVerifier I am getting a debug assertion in below lines in afxwin2.inl:
_AFXWIN_INLINE LRESULT CWnd::_AFX_FUNCNAME(SendMessage)(UINT message, WPARAM wParam, LPARAM lParam) const { ASSERT(::IsWindow(m_hWnd)); return ::SendMessage(m_hWnd, message, wParam, lParam); } And also m_hwnd is shown as unused 0 with the memory address of 0x00170fd6. Given below is the output from Application verifier.
VERIFIER STOP 00000013: pid 0xDF4: First chance access violation for current stack trace. 339F9020 : Invalid address causing the exception. 0109D75E : Code address executing the invalid access. 0018E034 : Exception record. 0018E084 : Context record. Following is the call stack of the debug build. It is too long, sorry for that.
ntdll.dll!7729000c() [Frames below may be incorrect and/or missing, no symbols loaded for ntdll.dll] vrfcore.dll!VfCoreRedirectedStopMessage(unsigned long Code=19, char * Message=0x73341b5c, unsigned long Param1=444756000, char * Description1=0x73341b94, unsigned long Param2=17422174, char * Description2=0x73341bb4, unsigned long Param3=1630260, char * Description3=0x73341bd4, unsigned long Param4=1630340, char * Description4=0x73341c00) Line 103 + 0x19 bytes C++ vfbasics.dll!VerifierStopMessage(unsigned long Code=19, char * Message=0x73341b5c, unsigned long Param1=444756000, char * Description1=0x73341b94, unsigned long Param2=17422174, char * Description2=0x73341bb4, unsigned long Param3=1630260, char * Description3=0x73341bd4, unsigned long Param4=1630340, char * Description4=0x73341c00) Line 1214 C vfbasics.dll!AVrfpCheckFirstChanceException(_EXCEPTION_POINTERS * ExceptionPointers=0x0018df7c) Line 1108 + 0x2b bytes C vfbasics.dll!AVrfpVectoredExceptionHandler(_EXCEPTION_POINTERS * ExceptionPointers=0x0018df7c) Line 323 C ntdll.dll!772f62de() ntdll.dll!772db652() ntdll.dll!772db314() ntdll.dll!77290133() user32.dll!753a617a() Axial.exe!CWnd::SendMessageA(unsigned int message=2125, unsigned int wParam=0, long lParam=0) Line 42 + 0x44 bytes C++ Axial.exe!SECWorkbookClientWnd::OnMDISetMenu(unsigned int wParam=261688291, long lParam=21302363) Line 390 C++ Axial.exe!CWnd::OnWndMsg(unsigned int message=560, unsigned int wParam=261688291, long lParam=21302363, long * pResult=0x0018e980) Line 2018 + 0x11 bytes C++ Axial.exe!CWnd::WindowProc(unsigned int message=560, unsigned int wParam=261688291, long lParam=21302363) Line 1755 + 0x20 bytes C++ Axial.exe!AfxCallWndProc(CWnd * pWnd=0x1a54bf98, HWND__ * hWnd=0x00120ff0, unsigned int nMsg=560, unsigned int wParam=261688291, long lParam=21302363) Line 240 + 0x1c bytes C++ Axial.exe!AfxWndProc(HWND__ * hWnd=0x00120ff0, unsigned int nMsg=560, unsigned int wParam=261688291, long lParam=21302363) Line 403 C++ user32.dll!753962fa() user32.dll!75397316() user32.dll!75396ce9() user32.dll!75396de8() user32.dll!75396e44() ntdll.dll!7729010a() user32.dll!753972b9() user32.dll!753a2161() user32.dll!753a0f91() user32.dll!753a9deb() user32.dll!753a9dfd() user32.dll!753a8124() Axial.exe!CMDIChildWnd::DefWindowProcA(unsigned int nMsg=34, unsigned int wParam=0, long lParam=0) Line 429 C++ Axial.exe!CWnd::WindowProc(unsigned int message=34, unsigned int wParam=0, long lParam=0) Line 1756 + 0x1c bytes C++ Axial.exe!AfxCallWndProc(CWnd * pWnd=0x1a826f08, HWND__ * hWnd=0x00210bbe, unsigned int nMsg=34, unsigned int wParam=0, long lParam=0) Line 240 + 0x1c bytes C++ Axial.exe!AfxWndProc(HWND__ * hWnd=0x00210bbe, unsigned int nMsg=34, unsigned int wParam=0, long lParam=0) Line 403 C++ user32.dll!753962fa() user32.dll!75396d3a() user32.dll!75396ce9() user32.dll!75396de8() user32.dll!75396e44() ntdll.dll!7729010a() user32.dll!75398e63() user32.dll!753a7b51() Axial.exe!CFrameWnd::BringToTop(int nCmdShow=1) Line 2362 C++ Axial.exe!CFrameWnd::ActivateFrame(int nCmdShow=1) Line 2341 C++ Axial.exe!CMDIChildWnd::ActivateFrame(int nCmdShow=-1) Line 762 C++ Axial.exe!CFrameWnd::InitialUpdateFrame(CDocument * pDoc=0x1a6a2de8, int bMakeVisible=1) Line 814 C++ Axial.exe!CDocTemplate::InitialUpdateFrame(CFrameWnd * pFrame=0x1a826f08, CDocument * pDoc=0x1a6a2de8, int bMakeVisible=1) Line 330 C++ Axial.exe!CMultiDocTemplate::OpenDocumentFile(const char * lpszPathName=0x0018f6fc, int bMakeVisible=1) Line 166 C++ Axial.exe!CDocManager::OpenDocumentFile(const char * lpszFileName=0x19418fa0) Line 986 C++ Axial.exe!CWinApp::OpenDocumentFile(const char * lpszFileName=0x19418fa0) Line 84 C++ Axial.exe!CAxialApp::OpenDocumentFile(const char * lpszFileName=0x19418fa0) Line 983 + 0xc bytes C++ Axial.exe!CWinApp::OnOpenRecentFile(unsigned int nID=57616) Line 132 + 0x2a bytes C++ Axial.exe!_AfxDispatchCmdMsg(CCmdTarget * pTarget=0x018e6e88, unsigned int nID=57616, int nCode=0, void (void)* pfn=0x009f8140, void * pExtra=0x00000000, unsigned int nSig=60, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 101 + 0xa bytes C++ Axial.exe!CCmdTarget::OnCmdMsg(unsigned int nID=57616, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 381 + 0x27 bytes C++ Axial.exe!CAxialApp::OnCmdMsg(unsigned int id=57616, int code=0, void * extra=0x00000000, AFX_CMDHANDLERINFO * handler=0x00000000) Line 1135 + 0x40 bytes C++ Axial.exe!CFrameWnd::OnCmdMsg(unsigned int nID=57616, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 951 + 0x23 bytes C++ Axial.exe!SECMDIFrameWnd::OnCmdMsg(unsigned int nID=57616, int nCode=0, void * pExtra=0x00000000, AFX_CMDHANDLERINFO * pHandlerInfo=0x00000000) Line 2270 C++ Axial.exe!CWnd::OnCommand(unsigned int wParam=57616, long lParam=0) Line 2364 C++ Axial.exe!CFrameWnd::OnCommand(unsigned int wParam=57616, long lParam=0) Line 366 C++ Axial.exe!SECMDIFrameWnd::OnCommand(unsigned int wParam=57616, long lParam=0) Line 2214 + 0x10 bytes C++ Axial.exe!CWnd::OnWndMsg(unsigned int message=273, unsigned int wParam=57616, long lParam=0, long * pResult=0x0018fc68) Line 1769 + 0x1e bytes C++ Axial.exe!CWnd::WindowProc(unsigned int message=273, unsigned int wParam=57616, long lParam=0) Line 1755 + 0x20 bytes C++ Axial.exe!SECMDIFrameWnd::WindowProc(unsigned int message=273, unsigned int wParam=57616, long lParam=0) Line 2685 + 0x14 bytes C++ Axial.exe!AfxCallWndProc(CWnd * pWnd=0x1a4acf78, HWND__ * hWnd=0x0005102a, unsigned int nMsg=273, unsigned int wParam=57616, long lParam=0) Line 240 + 0x1c bytes C++ Axial.exe!AfxWndProc(HWND__ * hWnd=0x0005102a, unsigned int nMsg=273, unsigned int wParam=57616, long lParam=0) Line 403 C++ user32.dll!753962fa() user32.dll!75396d3a() user32.dll!75396ce9() user32.dll!753977c4() user32.dll!75397bca() Axial.exe!AfxInternalPumpMessage() Line 183 C++ Axial.exe!CWinThread::PumpMessage() Line 900 C++ Axial.exe!CWinThread::Run() Line 629 + 0xd bytes C++ Axial.exe!CWinApp::Run() Line 896 C++ Axial.exe!AfxWinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x07e78ffd, int nCmdShow=1) Line 47 + 0xd bytes C++ Axial.exe!WinMain(HINSTANCE__ * hInstance=0x00400000, HINSTANCE__ * hPrevInstance=0x00000000, char * lpCmdLine=0x07e78ffd, int nCmdShow=1) Line 34 C++ Axial.exe!__tmainCRTStartup() Line 263 + 0x2c bytes C Axial.exe!WinMainCRTStartup() Line 182 C kernel32.dll!768033aa() ntdll.dll!772b9ef2() ntdll.dll!772b9ec5() Your help is greately appreciated. Thanks.