C#Winform窗口移动方法

private Point mouseOff;//鼠标移动位置变量  private bool leftFlag;//鼠标是否为左键  private void Form1_MouseDown(object sender, MouseEventArgs e)  {   if(e.Button == MouseButtons.Left)   {    mouseOff = new Point(-e.X, -e.Y);//获得当前鼠标的坐标    leftFlag = true;   }  }  private void Form1_MouseMove(object sender, MouseEventArgs e)  {   if (leftFlag)   {    Point mouseSet = Control.MousePosition;//获得移动后鼠标的坐标    mouseSet.Offset(mouseOff.X, mouseOff.Y);//设置移动后的位置    Location = mouseSet;   }  }  private void Form1_MouseUp(object sender, MouseEventArgs e)  {   if (leftFlag)   {    leftFlag = false;   }  }