当winform窗体的Bordestyle设置为None时，鼠标可以拖动窗体的办法

 方法一：
 1   2015-07-11  16:05:35
         bool formMove = false;//窗体是否移动
          Point formPoint;//记录窗体的位置
         private void Form1_MouseDown(object sender, MouseEventArgs e)
         {
             formPoint = new Point();
             int xOffset;
             int yOffset;
             if (e.Button == MouseButtons.Left)
             {
                 xOffset = -e.X;
                 yOffset = -e.Y;
                     formPoint = new Point(xOffset, yOffset);
                     formMove = true;//开始移动
             }
         }

         private void Form1_MouseMove(object sender, MouseEventArgs e)
         {
             if (formMove == true)
             {
                 Point mousePos = Control.MousePosition;
                 mousePos.Offset(formPoint.X, formPoint.Y);
                 Location = mousePos;
             }
         }

         private void Form1_MouseUp(object sender, MouseEventArgs e)
         {
             if (e.Button == MouseButtons.Left)//按下的是鼠标左键
             {
                 formMove = false;//停止移动
             }
         }

方法二：

         Point mouseOff;//鼠标移动位置变量
         bool leftFlag;//标签是否为左键
          private void Login_MouseDown(object sender, MouseEventArgs e)
         {
             if (e.Button == MouseButtons.Left)
             {
                 mouseOff = new Point(-e.X, -e.Y); //得到变量的值
                 leftFlag = true;                  //点击左键按下时标注为true;
             }
         }

         private void Login_MouseMove(object sender, MouseEventArgs e)
         {
             if (leftFlag)
             {
                 Point mouseSet = Control.MousePosition;
                 mouseSet.Offset(mouseOff.X, mouseOff.Y);  //设置移动后的位置
                 Location = mouseSet;
             }
         }

         private void Login_MouseUp(object sender, MouseEventArgs e)
         {
             if (leftFlag)
             {
                 leftFlag = false;//释放鼠标后标注为false;
             }
         }