1 private Point mouseOffset; //记录鼠标指针的坐标
 2 private bool isMouseDown = false; //记录鼠标按键是否按下
 3 private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e){
 4     int xOffset;
 5     int yOffset;
 6     if (e.Button == MouseButtons.Left){
 7         xOffset = -e.X - SystemInformation.FrameBorderSize.Width;
 8         yOffset = -e.Y - SystemInformation.CaptionHeight -
 9                   SystemInformation.FrameBorderSize.Height;
10         mouseOffset = new Point(xOffset, yOffset);
11         isMouseDown = true;
12     }
13 }
14 private void Form1_MouseMove(object sender, System.Windows.Forms.MouseEventArgs e){
15     if (isMouseDown){
16         Point mousePos = Control.MousePosition;
17         mousePos.Offset(mouseOffset.X, mouseOffset.Y);
18         Location = mousePos;
19     }
20 }
21 private void Form1_MouseUp(object sender, System.Windows.Forms.MouseEventArgs e){
22     // 修改鼠标状态isMouseDown的值，确保只有鼠标左键按下并移动时，才移动窗体
23     if (e.Button == MouseButtons.Left){
24         isMouseDown = false;
25     }
26 }