I'm having a bug in my code that's kicking my ***, so after much attempted debugging I finally decided to see if anyone else knew what my issue was.

I'm trying to add a grid object to a dialog that I have, but I keep hitting the assert in the title and I don't know why.

LONG myDialog::OnInitDialog(UINT wParam, LONG lParam)
    BOOL bRet = super::OnInitDialog();


    RefMemberDelegate1(*this, &myDialog::OnNewDoc), this); //attach to event so I know when document is created

    return bRet;

void myDialog::OnNewDoc(CDerivedDocument* pNewDoc)
    pNewDoc->SetMyDialog(this); // when new document is created, set pointer to dialog

void myDialog::InitGridControl()
    CRect rect;
    // Get the grid area rectangle and set it up.
    GetDlgItem(IDC_GRID)->MapWindowPoints(this, &rect); //replacing dummy image with the grid

    m_Grid = new myGridCtrl;
    bool result = m_Grid->Create(WS_CHILD | WS_BORDER | WS_VISIBLE | WS_TABSTOP, rect, this, IDC_GRID);

    // Set the appropriate options 

    m_Grid->InsertColumn(0, _T("Name"), 100); //doesn't seem to crash here, which means grid is creted okay?


void myDialog::PopulateGridControl(BOOL bRedraw, CDerivedDocument * pDoc)

    if(GetSafeHwnd() == NULL)

    //get handles to document and stuff

    m_Grid->SetRedraw(FALSE); // ASSERTS HERE

    //other stuff


//In CDocument once it is created...

CDerivedDocument::SetMyDoc(myDialog * pDlg)
Any idea what's going on? I mean, I only create the dialog once everything has been initalized, so there shouldn't be a problem there. m_Grid.Create() returns true, so creation is successful. Why is SetRedraw() hitting the assert that the m_hWnd isn't a handle to a window? Where does m_hWnd get set anyway?

Thanks for any help you can offer.