CFormView Child of CDialog Causes Heap Corruption

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   Somewhat new to MFC development and stumped.

I am trying to embed a CFormView as a child window into the client area of a CDialog.

My experiment is as follows (snippets / pseudo code)

class ButtonButtonPanel : public CFormView

private:

     CButton button1;

     CButton button2;

class ButtonPanelDialog : public CDialog

private:

     ButtonPanel panel;

BOOL ButtonPanel::Create( CWnd* pParent )

{

    CRect rect ; 

    pParent->GetClientRect( rect ) ;

     rect.bottom = 75 ;

    return CFormView::Create( NULL, NULL, WS_CHILD | WS_VISIBLE, rect, pParent, 0, NULL ) ;

}

BOOL ButtonPanelDialog::OnInitDialog( void ) 

{

     __super::OnInitDialog( ) ;

     buttonPanel.Create( this ) ;

     return TRUE ;

} ;

int main( )

{     

    ButtonPanelDialog dialog ;

    dialog.DoModal( ) ;

    return 0 ;

}

Everything works.  The call to DoModal pops up the dialog which contains the panel with the 2 buttons on it.  

When I close the dialog.  It crashes saying the heap has been corrupted.

Have no clue why.  There is obviously something that I am not understanding.  Would greatly appreciate it if someone could help me cure my ignorance.

Thanks a lot.

-David

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AZDavidPhx Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 August 2010 Status: Offline Points: 3	Post Options Post Reply Quote AZDavidPhx Report Post Thanks(0) Quote Reply Topic: CFormView Child of CDialog Causes Heap Corruption Posted: 14 August 2010 at 2:33pm
	Somewhat new to MFC development and stumped. I am trying to embed a CFormView as a child window into the client area of a CDialog. My experiment is as follows (snippets / pseudo code) class ButtonButtonPanel : public CFormView private: CButton button1; CButton button2; class ButtonPanelDialog : public CDialog private: ButtonPanel panel; BOOL ButtonPanel::Create( CWnd* pParent ) { CRect rect ; pParent->GetClientRect( rect ) ; rect.bottom = 75 ; return CFormView::Create( NULL, NULL, WS_CHILD \| WS_VISIBLE, rect, pParent, 0, NULL ) ; } BOOL ButtonPanelDialog::OnInitDialog( void ) { __super::OnInitDialog( ) ; buttonPanel.Create( this ) ; return TRUE ; } ; int main( ) { ButtonPanelDialog dialog ; dialog.DoModal( ) ; return 0 ; } Everything works. The call to DoModal pops up the dialog which contains the panel with the 2 buttons on it. When I close the dialog. It crashes saying the heap has been corrupted. Have no clue why. There is obviously something that I am not understanding. Would greatly appreciate it if someone could help me cure my ignorance. Thanks a lot. -David

AZDavidPhx Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 14 August 2010 Status: Offline Points: 3	Post Options Post Reply Quote AZDavidPhx Report Post Thanks(0) Quote Reply Posted: 14 August 2010 at 2:36pm
	Here is the actual code: // ConsoleApp.cpp : Defines the entry point for the console application. // #include "stdafx.h" #include "ConsoleApp.h" #include "Resource.h" #ifdef _DEBUG #define new DEBUG_NEW #endif // The one and only application object CWinApp theApp; using namespace std; class ButtonPanel : public CFormView { public: ButtonPanel( void ) ; ~ButtonPanel( void ) ; virtual BOOL Create( CWnd* pParent ) ; protected: virtual void DoDataExchange( CDataExchange* pDX ) ; private: CButton button1 ; CButton button2 ; } ; ButtonPanel::ButtonPanel( void ) :CFormView( IDD_BUTTON_PANEL ) { } ; ButtonPanel::~ButtonPanel( void ) { } ; BOOL ButtonPanel::Create( CWnd* pParent ) { CRect rect ; pParent->GetClientRect( rect ) ; rect.bottom = 75 ; return CFormView::Create( NULL, NULL, WS_CHILD \| WS_VISIBLE, rect, pParent, 0, NULL ) ; } void ButtonPanel::DoDataExchange( CDataExchange* pDX ) { __super::DoDataExchange( pDX ) ; DDX_Control( pDX, IDC_BUTTON1, button1 ) ; DDX_Control( pDX, IDC_BUTTON2, button2 ) ; } ; class ButtonPanelDialog : public CDialog { public: ButtonPanelDialog( void ) ; ~ButtonPanelDialog( void ) ; virtual BOOL OnInitDialog( void ) ; private: ButtonPanel buttonPanel ; } ; ButtonPanelDialog::ButtonPanelDialog( void ) : CDialog( IDD_DIALOG ), buttonPanel( ) { } ; ButtonPanelDialog::~ButtonPanelDialog( void ) { } ; BOOL ButtonPanelDialog::OnInitDialog( void ) { __super::OnInitDialog( ) ; buttonPanel.Create( this ) ; return TRUE ; } ; int _tmain(int argc, TCHAR* argv[], TCHAR* envp[]) { int nRetCode = 0; // initialize MFC and print and error on failure if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0)) { // TODO: change error code to suit your needs _tprintf(_T("Fatal Error: MFC initialization failed\n")); nRetCode = 1; } else { ButtonPanelDialog dialog ; dialog.DoModal( ) ; } return nRetCode; }