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1

调用API    using System.Runtime.InteropServices;    [DllImport("user32.dll")]     public static extern bool ReleaseCapture();    [DllImport("user32.dll")]    public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);   public const int WM_SYSCOMMAND = 0x0112;   public const int SC_MOVE = 0xF010;    public const int HTCAPTION = 0x0002; 在空间的_MouseDown中加入如下代码:    如:    private void Form1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)   {    ReleaseCapture();    SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);   }

或2

Point mouseOff;//鼠标移动位置变量        bool leftFlag;//标签是否为左键        private void Form1_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 Form1_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 Form1_MouseUp(object sender, MouseEventArgs e)        {            if (leftFlag)            {                leftFlag = false;//释放鼠标后标注为false;            }        }

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