C#窗体设置移动

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private Point mouseOff;//鼠标移动位置变量
        private bool leftFlag;//标签是否左键
        private void Frm_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 Frm_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 Frm_MouseUp(object sender, MouseEventArgs e)
        {
            if (leftFlag)
            {
                leftFlag = false;//释放鼠标后标注为false
            }
        }

以上复制关联MouseDown、MouseMove、MouseUp三个事件即可。

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