using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Text;
using?System.Windows.Forms;

namespace?GroupBoxMove
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?Form1_Load（object?sender?EventArgs?e）
????????{
????????????grbRight.AllowDrop?=?true;
????????????//CaptionHeight?=?40;
???????????
????????}

????????///?

????????///?拖動的控件;?可在此處修改
????????///?

????????private?int?n_Type?=?0;

????????private?void?label1_MouseDown（object?sender?MouseEventArgs?e）
????????{
????????????n_Type?=?1;
????????????label1.DoDragDrop（sender?DragDropEffects.Move）;
????????}

????????private?void?textBox1_MouseDown（object?sender?MouseEventArgs?e）
????????{
????????????n_Type?=?2;
????????????textBox1.DoDragDrop（sender?DragDropEffects.Move）;
????????}

????????private?void?button1_MouseDown（object?sender?MouseEventArgs?e）
????????{
????????????n_Type?=?3;
????????????button1.DoDragDrop（sender?DragDropEffects.Move）;
????????}


????????private?void?grbRight_DragDrop（object?sender?DragEventArgs?e）
????????{
????????????Control?col?=?（Control）sender;

????????????int?nW?=?（this.Width?-?this.ClientRectangle.Width）?/?2;

????????????Point?pC?=?new?Point（this.Location.X?+?nW?+?col.Location.X?this.Location.Y?+?col.Location.Y?+?this.Height?-?this.ClientRectangle.Height?-?nW）;
????????????Point?p?=?new?Point（e.X?-?pC.X?e.Y?-?pC.Y）;
????????????switch?（n_Type）
????????????{
????????????????case?1:
????????????????????grbLeft.Controls.Remove（label1）;
????????????????????grbRight.Controls.Add（label1）;
????????????????????label1.MouseDown?-=?new?MouseEventHandler（label1_MouseDown）;
????????????????????label1.Location?=?p;
????????????????????MoveControl?label?=?new?MoveControl（label1）;
????????????????????break;
????????????????case?2:
????????????????????grbLeft.Controls.Remove（textBox1）;
????????????????????grbRight.Controls.Add（textBox1）;
????????????????????textBox1.Location?=?p;
????????????????????textBox1.MouseDown?-=?new?MouseEventHandler（textBox1_MouseDown）;
????????????????????MoveControl?textBox?=?new?MoveControl（textBox1）;
????????????????????break;
????????????????case?3:
????????????????????Button?btn?=?new?Button（）;
????????????????????btn.Text?=?“New“;
????????????????????grbRight.Controls.Add（btn）;
????????????????????btn.Location?=?p;
????????????????????MoveControl?button?=?new?MoveControl（btn）;
????????????????????break;



????????????}

????????}

????????private?void?grbRight_DragEnter（object?sender?DragEventArgs?e）
????????{
????????????e.Effect?=?DragDropEffects.Move;

????????}
????}
}