WindowForm窗体去掉边框后每个控件的通用移动事件

WindowForm窗体去掉边框后每个控件的通用移动事件

private Point mouseOff;//鼠标移动位置变量
        private bool leftFlag;//标签是否为左键
        private void FrmMain_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 FrmMain_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 FrmMain_MouseUp(object sender, MouseEventArgs e)
        {
            if (leftFlag)
            {
                leftFlag = false;//释放鼠标后标注为false;
            }
        }
        private void btnExitSys_Click(object sender, EventArgs e)
        {
            this.Close();
        }

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