CGridCtrl in CCtrlView

[mesajflaviu]

I am trying to use CGridCtrl inside of CCtrlView, in an MDI app. And I wrote this:

class CTestGridView : public CCtrlView
{
protected: // create from serialization only
	CTestGridView();
	DECLARE_DYNCREATE(CTestGridView)

// Attributes
public:
	CTestGridDoc* GetDocument() const;
	CGridCtrl& GetGridCtrl() const {return *(CGridCtrl*)this;}
....
}

and in cpp:

CTestGridView::CTestGridView()
	:CCtrlView(GRIDCTRL_CLASSNAME, AFX_WS_DEFAULT_VIEW)
{
	// TODO: add construction code here

	WNDCLASS wndcls;
	//HINSTANCE hInst = AfxGetInstanceHandle();
	HINSTANCE hInst = AfxGetResourceHandle();
	if(! (::GetClassInfo(hInst, GRIDCTRL_CLASSNAME, &wndcls)))
	{
		// otherwise we need to register a new class
		wndcls.style			= CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
		wndcls.lpfnWndProc		= ::DefWindowProc;
		wndcls.cbClsExtra		= wndcls.cbWndExtra = 0;
		wndcls.hInstance		= hInst;
		wndcls.hIcon			= NULL;
#ifndef _WIN32_WCE_NO_CURSOR
		wndcls.hCursor		  = AfxGetApp()->LoadStandardCursor(IDC_ARROW);
#else
		wndcls.hCursor		  = 0;
#endif
		wndcls.hbrBackground	= (HBRUSH) (COLOR_3DFACE + 1);
		wndcls.lpszMenuName		= NULL;
		wndcls.lpszClassName	= GRIDCTRL_CLASSNAME;

		if(! AfxRegisterClass(&wndcls))
		{
			AfxThrowResourceException();
		}
	}
}

Until here, it goes without problem ... but when I am trying to use CGridCtrl object inside, I get a crash:

void CTestGridView::OnInitialUpdate() 
{
	CCtrlView::OnInitialUpdate();
	
	CGridCtrl& GridCtrl = (CGridCtrl&)GetGridCtrl();
	GridCtrl.SetRowCount(1); // <-- crash
}

and the error is:

Unhandled exception at 0x77ce0ebc (mfc90d.dll) in TestGrid.exe: 0xC0000005: Access violation reading location 0xfeeefeee.

	if (!AfxIsValidAddress(pOb, pOb->GetRuntimeClass()->m_nObjectSize, FALSE))
	{
		TRACE(traceAppMsg, 0, "ASSERT_VALID fails with illegal pointer.\n");
		if (AfxAssertFailedLine(lpszFileName, nLine))
			AfxDebugBreak();
		return;     // quick escape
	}

This error has been triggered when grid is trying to call:

	TRY
	{
		m_arRowHeights.SetSize(nRows); // <-- here is firing the crash

Is obvious that I done something wrong ... but what ? It is possible what I am trying to do ?

Thank you for any hint/help in solving my task.


P.S. I attach an test app that illustrate the problem.