C#界面设计，添加无边框窗体的鼠标拖动可以移动效果

 1  private void Login_MouseMove(object sender, MouseEventArgs e)
 2         {
 3             //鼠标指向检测
 4             if (leftFlag)
 5 
 6             {
 7 
 8                 Point mouseSet = Control.MousePosition;
 9 
10                 mouseSet.Offset(mouseOff.X, mouseOff.Y);  //设置移动后的位置
11 
12                 Location = mouseSet;
13 
14             }
15             //
16         }
17 
18         private void Login_MouseUp(object sender, MouseEventArgs e)
19         {
20 
21             if (leftFlag)
22 
23             {
24 
25                 leftFlag = false;//释放鼠标后标注为false;
26 
27             }
28         }
29 
30         private void Login_MouseDown(object sender, MouseEventArgs e)
31         {
32             if (e.Button == MouseButtons.Left)
33 
34             {
35 
36                 mouseOff = new Point(-e.X, -e.Y); //得到变量的值
37 
38                 leftFlag = true;                  //点击左键按下时标注为true;
39 
40             }
41         }