Visual C++ :: Creating CWnd With Parent Of Type CFormView - App Crashes

My app crashes when I attempt to create a CWnd as shown below. I am attempting to create the CWnd with a a parent of type CFormView. Why this might be crashing?

Code:
CWnd::Create(AfxRegisterWndClass(CS_DBLCLKS), CString(windowName.c_str()), WS_VISIBLE | WS_BORDER, dimensions, parent, NULL, NULL);

The call stack looks like this:

Code:
mfc100ud.dll!AfxGetInstanceHandle() Line 21 + 0x20 bytesC++
mfc100ud.dll!AfxRegisterWndClass(unsigned int nClassStyle, HICON__ * hCursor, HBRUSH__ * hbrBackground, HICON__ * hIcon) Line 1462 + 0x5 bytesC++

And the line that crashes here us the AfxGetInstanceHandle() call:

Code:
LPCTSTR AFXAPI AfxRegisterWndClass(UINT nClassStyle,
HCURSOR hCursor, HBRUSH hbrBackground, HICON hIcon) {
// Returns a temporary string name for the class
// Save in a CString if you want to use it for a long time
LPTSTR lpszName = AfxGetThreadState()->m_szTempClassName;

// generate a synthetic name for this class
HINSTANCE hInst = AfxGetInstanceHandle();