移动无边框窗体

开发环境：vs2010，步骤如下所示：

1、创建一个Windows应用程序，窗体默认Form1,将Form1的FormBorderStyle属性值设置为None

2、代码如下所示：

namespace Kaifafanli
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //设置全局变量，初始化
        bool beginMove = false;
        int currentXPosition = 0;
        int currentYPosition = 0;
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            beginMove = true;
            currentXPosition = MousePosition.X;//鼠标的x坐标为当前窗体左上角x坐标
            currentYPosition = MousePosition.Y;
        }

        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if(beginMove)
            {
                this.Left += MousePosition.X - currentXPosition;//根据鼠标x坐标确定窗体的左边坐标x
                this.Top += MousePosition.Y - currentYPosition;
                currentXPosition = MousePosition.X;
                currentYPosition = MousePosition.Y;
            }
        }

        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            beginMove = false;
        }

        private void Form1_MouseLeave(object sender, EventArgs e)
        {
            currentXPosition = 0;
            currentYPosition = 0;
            beginMove = false;
        }        

       
    }
}