定義一個位置資訊Point用於儲存滑鼠位置

 private Point mPoint;

給窗體等控制元件增加MouseDown和MouseMove事件

 /// <summary>
 2         /// 滑鼠按下
 3         /// </summary>
 4         /// <param name="sender"></param>
 5         /// <param name="e"></param>
 6         private void panel1_MouseDown(object sender, MouseEventArgs e)
 
 
7         {
 8             mPoint = new Point(e.X, e.Y);
 9         }
10 
11         /// <summary>
12         /// 滑鼠移動
13         /// </summary>
14         /// <param name="sender"></param>
15         /// <param name="e"></param>
16         private void panel1_MouseMove(object sender, MouseEventArgs e)
 
17         {
18             if (e.Button == MouseButtons.Left)
19             {
20                 this.Location = new Point(this.Location.X + e.X - mPoint.X, this.Location.Y + e.Y - mPoint.Y);
21             }
22         }

這樣就可以隨意移動位置了。