HELP regarding m_pCtrlSite

Hi,
I just noticed an error occuring constantly namely:
First-chance exception at 0x00fd9a11 (mfc71d.dll) in IViewRemote.exe: 0xC0000005: Access violation reading location 0xcdcdcdcd.

I tracked it down to a function:

Code:

---

void CWnd::SetWindowText(LPCTSTR lpszString)
{
        ASSERT(::IsWindow(m_hWnd) || (m_pCtrlSite != NULL));

        if (m_pCtrlSite == NULL)
                ::SetWindowText(m_hWnd, lpszString);
        else
                m_pCtrlSite->SetWindowText(lpszString);
}

---

It seems that the function works when m_pCtrlSite is not set, it works properly but when it is, the program causes an exception and crashes. I would really appreciate some insight into why that would happen. Thanks a lot,
Amish

Post the code that initializes m_pCtrlSite.

Kuphryn

The problem is my code does not touch m_pCtrlSite at all so I don't know where or when it is being set. The piece of code above is found in winocc.cpp. Thanks for any help,
Amish

I see.

Describe your application especially the window that causes the crash. Have you looked at the stack during debugging?

Kuphryn

Try call AfxEnableControlContainer() in your app's InitInstance

I have an MDI application with two views. Each view opens up a modeless dialog which contains various buttons and controls. One such control is a static text that is supposed to be updated as video is stored on the hard disk. To do that, the following function calls are made:

Code:

---

static CWnd* pLabel = NULL;
pLabel = CWnd::FromHandle(hwnd)->GetDlgItem(IDC_FREE_LABEL);
CString        freeLabel;
CString percentLabel;
freeLabel.LoadString(IDS_MSG_FREE_PCT);
percentLabel.Format("%d", freePercentage);
freeLabel = percentLabel + freeLabel;
pLabel->SetWindowText(freeLabel);

---

The SetWindowText(freeLabel) causes the program to crash. I did try going up the call stack but it just points me to the function containing the aboce code. Thanks a lot,
Amish

I am developing an MFC dialog with VC6 and started receiving
this nasty assertion after adding a slider control. I went back to
previous versions but the app continued to bomb out on the destruction
of other dialog controls when exiting app. The program hangs on checking
the m_pCtrlSite != NULL conditional in one of the windows containers.

I fixed the problem by just adding a do-nothing destructor to the main
dialog class:

CA2D_ConsoleDlg::~CA2D_ConsoleDlg()
{
return;
}


Don't know if this is Kosher, but it seems to work.

/curleyj