MapWinGIS-5.1.1-win32/x64-VS2017.
My Dev tool: VS2019 16.5 + WTL.

Though I the activeX works well in a C# program, I could not make it working in a C++ program.
The program always crashes when it tries to load the activeX at the function below.

// atlhost.h file
       // IOleInPlaceSiteEx
	STDMETHOD(OnInPlaceActivateEx)(
		_In_opt_ BOOL* /*pfNoRedraw*/,
		DWORD dwFlags) {
	
		...	
		
	if (m_spInPlaceObjectWindowless)
		m_spInPlaceObjectWindowless->SetObjectRects(&m_rcPos, &m_rcPos); <-- crashes at this point.
		return S_OK;
	}

I want someone to confirm that if the activeX supports integration with ATL/WTL C++ programs.