private void Form5_MouseMove(object sender, MouseEventArgs e) { int intOX = rectDrawArea.X; int intOY = rectDrawArea.Y; rectDrawArea.X = e.X; rectDrawArea.Y = e.Y; Debug.WriteLine(rectDrawArea.ToString()); //Invalidate(); MyDrawFun(); } private void MyDrawFun() { Graphics go = Graphics.FromHwnd(this.Handle); Bitmap bitmap = new Bitmap(this.ClientSize.Width, this.ClientSize.Height); Graphics g = Graphics.FromImage(bitmap); g.Clear(System.Drawing.SystemColors.Control); g.DrawRectangle(Pens.Red, rectDrawArea); Bitmap logo = Properties.Resources.baidulogo; g.DrawImage(logo, 0, 0); go.DrawImage(bitmap, 0, 0, this.ClientSize.Width, this.ClientSize.Height); g.Dispose(); bitmap.Dispose(); }