//------------------------------------------------------------------- /// 現在の対象ウィンドウのClient領域をXORで塗りつぶす private void XorTargetWindowRect() { User32.RECT currentTargetRect; User32.GetClientRect(this.currentTargetWindow, out currentTargetRect); var originalDrawMode = GDI32.SetROP2(this.currentTargetDC, GDI32.R2_XORPEN); var originalPen = GDI32.SelectObject(this.currentTargetDC, App.NullPen.Pen); GDI32.Rectangle(this.currentTargetDC, currentTargetRect.Left, currentTargetRect.Top, currentTargetRect.Right, currentTargetRect.Bottom); GDI32.SelectObject(this.currentTargetDC, originalPen); GDI32.SetROP2(this.currentTargetDC, originalDrawMode); }