private void button1_Click(object sender, EventArgs e)
        {
            Graphics objGraphics = null;
            objGraphics = this.CreateGraphics();
            objGraphics.Clear(SystemColors.Control);
            objGraphics.DrawRectangle(Pens.Blue,
                picShowPicture1.Left - 1, picShowPicture1.Top - 1,
                picShowPicture1.Width + 1, picShowPicture1.Height + 1);
            objGraphics.Dispose();


        }


这段代码中objGraphics.DrawRectangle(Pens.Blue,
                picShowPicture1.Left - 1, picShowPicture1.Top - 1,
                picShowPicture1.Width + 1, picShowPicture1.Height + 1);
是在图片框空件外面绘制一个蓝色的线框，为什么我代码谈加上去却没显示呢？而且也没报代码错误！


求助！！！！！！！

谢谢！已经解决了，问题出在控件的属性名上面！