【C#】设置窗口随意移动

窗口标题栏隐藏后 无法在拖动

需要自己获取移动坐标来设置窗口位置

        //外部需要两个集变量
        private Point mouseOff;//鼠标移动位置变量

        private bool leftFlag;//鼠标是否为左键

        //鼠标按下事件
        private void pictureBox2_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;
            }
        }

        //鼠标移动事件
        private void pictureBox2_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;//窗口为移动值
            }
        }

        //鼠标放开事件
        private void pictureBox2_MouseUp(object sender, MouseEventArgs e)
        {
            if (leftFlag)
            {
                leftFlag = false;
            }
        }