LRESULT GLCtrl::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
	if(message == WM_PAINT && hDC && hRC) {
		wglMakeCurrent(hDC, hRC);
		GLPaint();
		SwapBuffers(hDC);
		wglMakeCurrent(NULL, NULL);
		PAINTSTRUCT ps;
		BeginPaint(GetHWND(), &ps);
		EndPaint(GetHWND(), &ps);
		return 0;
	}
	return DHCtrl::WindowProc(message, wParam, lParam);
}

void Layout()
{
    wglMakeCurrent(GLCtrl::GetDC(), GLCtrl::GetHGLRC());

    ....Projection stuff

    wglMakeCurrent(NULL, NULL);
}

void State(int reason) 
{
    GLCtrl::State(reason);
    Layout();
}