public static extern BOOL EndPaint( HWND hWnd, ref PAINTSTRUCT lpPaint );
public static extern HDC BeginPaint( HWND hWnd, ref PAINTSTRUCT lpPaint );
public static extern BOOL EndPaint( HWND hWnd, ref PAINTSTRUCT lpPaint );
public static extern HDC BeginPaint( HWND hWnd, ref PAINTSTRUCT lpPaint );