C# WinForm控件移动调整大小

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class ControlComponent    {        #region 实现窗体内的控件拖动        //用法：在Form初始化或者Form_Load时先执行        //DragComponent a = new DragComponent();        //a.initProperty(groupBox1);        //将界面groupBox1上的所有控件都绑定MyMouseDown、MyMouseLeave、MyMouseMove事件。          private Control control;        const int Band = 5;        const int MinWidth = 10;        const int MinHeight = 10;        private EnumMousePointPosition m_MousePointPosition;        private Point p, p1;          public enum EnumMousePointPosition        {              MouseSizeNone = 0, //'无              MouseSizeRight = 1, //'拉伸右边框              MouseSizeLeft = 2, //'拉伸左边框              MouseSizeBottom = 3, //'拉伸下边框              MouseSizeTop = 4, //'拉伸上边框              MouseSizeTopLeft = 5, //'拉伸左上角              MouseSizeTopRight = 6, //'拉伸右上角              MouseSizeBottomLeft = 7, //'拉伸左下角              MouseSizeBottomRight = 8, //'拉伸右下角              MouseDrag = 9 // '鼠标拖动          }          public void MyMouseDown(object sender, System.Windows.Forms.MouseEventArgs e)        {              p.X = e.X;              p.Y = e.Y;                  p1.X = e.X;              p1.Y = e.Y;          }          public void MyMouseLeave(object sender, System.EventArgs e)        {              m_MousePointPosition = EnumMousePointPosition.MouseSizeNone;              control.Cursor = Cursors.Arrow;          }          public EnumMousePointPosition MousePointPosition(Size size, System.Windows.Forms.MouseEventArgs e)        {                  if ((e.X >= -1 * Band) | (e.X <= size.Width) | (e.Y >= -1 * Band) | (e.Y <= size.Height))            {                  if (e.X < Band)                {                      if (e.Y < Band)                    {                        return EnumMousePointPosition.MouseSizeTopLeft;                    }                      else                    {                          if (e.Y > -1 * Band + size.Height)                        {                            return EnumMousePointPosition.MouseSizeBottomLeft;                        }                          else                        {                            return EnumMousePointPosition.MouseSizeLeft;                        }                      }                  }                  else                {                      if (e.X > -1 * Band + size.Width)                    {                          if (e.Y < Band)                        {                            return EnumMousePointPosition.MouseSizeTopRight;                        }                          else                        {                              if (e.Y > -1 * Band + size.Height)                            {                                return EnumMousePointPosition.MouseSizeBottomRight;                            }                              else                            {                                return EnumMousePointPosition.MouseSizeRight;                            }                          }                      }                      else                    {                          if (e.Y < Band)                        {                            return EnumMousePointPosition.MouseSizeTop;                        }                          else                        {                              if (e.Y > -1 * Band + size.Height)                            {                                return EnumMousePointPosition.MouseSizeBottom;                            }                              else                            {                                return EnumMousePointPosition.MouseDrag;                            }                          }                      }                  }              }              else            {                return EnumMousePointPosition.MouseSizeNone;            }          }          public void MyMouseMove(object sender, System.Windows.Forms.MouseEventArgs e)        {              Control lCtrl = (sender as Control);            if (e.Button == MouseButtons.Left)            {                  switch (m_MousePointPosition)                {                      case EnumMousePointPosition.MouseDrag:                          lCtrl.Left = lCtrl.Left + e.X - p.X;                          lCtrl.Top = lCtrl.Top + e.Y - p.Y;                          break;                      case EnumMousePointPosition.MouseSizeBottom:                          lCtrl.Height = lCtrl.Height + e.Y - p1.Y;                          p1.X = e.X;                          p1.Y = e.Y; //'记录光标拖动的当前点                          break;                      case EnumMousePointPosition.MouseSizeBottomRight:                          lCtrl.Width = lCtrl.Width + e.X - p1.X;                          lCtrl.Height = lCtrl.Height + e.Y - p1.Y;                          p1.X = e.X;                          p1.Y = e.Y; //'记录光标拖动的当前点                          break;                      case EnumMousePointPosition.MouseSizeRight:                          lCtrl.Width = lCtrl.Width + e.X - p1.X;                          //      lCtrl.Height = lCtrl.Height + e.Y - p1.Y;                          p1.X = e.X;                          p1.Y = e.Y; //'记录光标拖动的当前点                          break;                      case EnumMousePointPosition.MouseSizeTop:                          lCtrl.Top = lCtrl.Top + (e.Y - p.Y);                          lCtrl.Height = lCtrl.Height - (e.Y - p.Y);                          break;                      case EnumMousePointPosition.MouseSizeLeft:                          lCtrl.Left = lCtrl.Left + e.X - p.X;                          lCtrl.Width = lCtrl.Width - (e.X - p.X);                          break;                      case EnumMousePointPosition.MouseSizeBottomLeft:                          lCtrl.Left = lCtrl.Left + e.X - p.X;                          lCtrl.Width = lCtrl.Width - (e.X - p.X);                          lCtrl.Height = lCtrl.Height + e.Y - p1.Y;                          p1.X = e.X;                          p1.Y = e.Y; //'记录光标拖动的当前点                          break;                      case EnumMousePointPosition.MouseSizeTopRight:                          lCtrl.Top = lCtrl.Top + (e.Y - p.Y);                          lCtrl.Width = lCtrl.Width + (e.X - p1.X);                          lCtrl.Height = lCtrl.Height - (e.Y - p.Y);                          p1.X = e.X;                          p1.Y = e.Y; //'记录光标拖动的当前点                          break;                      case EnumMousePointPosition.MouseSizeTopLeft:                          lCtrl.Left = lCtrl.Left + e.X - p.X;                          lCtrl.Top = lCtrl.Top + (e.Y - p.Y);                          lCtrl.Width = lCtrl.Width - (e.X - p.X);                          lCtrl.Height = lCtrl.Height - (e.Y - p.Y);                          break;                      default:                          break;                  }                  if (lCtrl.Width < MinWidth) lCtrl.Width = MinWidth;                  if (lCtrl.Height < MinHeight) lCtrl.Height = MinHeight;                  }              else            {                  m_MousePointPosition = MousePointPosition(lCtrl.Size, e); //'判断光标的位置状态                  switch (m_MousePointPosition) //'改变光标                {                      case EnumMousePointPosition.MouseSizeNone:                          control.Cursor = Cursors.Arrow;       //'箭头                          break;                      case EnumMousePointPosition.MouseDrag:                          control.Cursor = Cursors.SizeAll;     //'四方向                          break;                      case EnumMousePointPosition.MouseSizeBottom:                          control.Cursor = Cursors.SizeNS;      //'南北                          break;                      case EnumMousePointPosition.MouseSizeTop:                          control.Cursor = Cursors.SizeNS;      //'南北                          break;                      case EnumMousePointPosition.MouseSizeLeft:                          control.Cursor = Cursors.SizeWE;      //'东西                          break;                      case EnumMousePointPosition.MouseSizeRight:                          control.Cursor = Cursors.SizeWE;      //'东西                          break;                      case EnumMousePointPosition.MouseSizeBottomLeft:                          control.Cursor = Cursors.SizeNESW;    //'东北到南西                          break;                      case EnumMousePointPosition.MouseSizeBottomRight:                          control.Cursor = Cursors.SizeNWSE;    //'东南到西北                          break;                      case EnumMousePointPosition.MouseSizeTopLeft:                          control.Cursor = Cursors.SizeNWSE;    //'东南到西北                          break;                      case EnumMousePointPosition.MouseSizeTopRight:                          control.Cursor = Cursors.SizeNESW;    //'东北到南西                          break;                      default:                          break;                  }              }        }          public void initProperty(Control ctl)        {            control = ctl;            control.MouseDown += new System.Windows.Forms.MouseEventHandler(MyMouseDown);            control.MouseLeave += new System.EventHandler(MyMouseLeave);            control.MouseMove += new System.Windows.Forms.MouseEventHandler(MyMouseMove);          }          #endregion      }

 使用方法：

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ControlComponent cc= new ControlComponent();               cc.initProperty(你需要改变的控件);