实现(不规则)窗体或者控件的拖动

方法一: 窗体或者控件的拖动

   private Point m_MousePoint;
    private Point m_LastPoint;

  protected override void OnMouseDown(MouseEventArgs e)
    {
      base.OnMouseDown(e);
      this.m_LastPoint = this.Location;
      this.m_MousePoint = this.PointToScreen(e.Location);
    }

    protected override void OnMouseMove(MouseEventArgs e)
    {
      base.OnMouseMove(e);
      if (e.Button == MouseButtons.Left)
      {
        Point t = this.PointToScreen(e.Location);
        Point l = this.m_LastPoint;

        l.Offset(t.X - this.m_MousePoint.X, t.Y - this.m_MousePoint.Y);
        this.Location = l;
      }
    }

1 代码直接复制到窗体上就可以使用.

2 可以用到UserControl上,UserControl就成了一个可拖动的控件了

3 可以用到自定义控件上,例如:自定义控件继承了一个Button ,然后写上上面代码,那么这个自定义Button就可以在Form窗体上随处拖动....

 方法二: 不规则窗体拖动

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;

public void ShapedForm_MouseDown(object sender, MouseEventArgs e) 
        { 
            ReleaseCapture();
            SendMessage(this.Handle, WM_SYSCOMMAND, SC_MOVE + HTCAPTION, 0);
        }

方法二:比较好 ,能够画出 虚线框,跟Windows的窗体拖动一样...........

转载于：http://115599727.blog.sohu.com/155537000.html