HWND m_hWnd;RECT m_WndRect;LONG m_Style; enum WINDOW_SHOW ... { WINDOW_FULLSCREEN, WINDOW_800_600, WINDOW_1024_768} ;WINDOW_SHOW m_eWndShow;m_eWndShow = WINDOW_800_600; // 创建主窗口 HWND hWnd;hWnd = CreateWindowEx( ... ); if ( ! hWnd ) return FALSE;m_hWnd = hWnd;BOOL SetFullScreen()