private void DrawOverlay(int top, int right, int bottom, int left) { if (_overlayWindow == null) { _overlayWindow = new OverlayWindow(); _overlayWindow.Initialize(); } _overlayWindow.Run( left * FullScreen.BoxWidth, top * FullScreen.BoxHeight, (right + 1) * FullScreen.BoxWidth, (bottom + 1) * FullScreen.BoxHeight ); }