//用在SETreeView 的拖放操作时
//http://www.codeproject.com/KB/tree/TreeViewDragDrop.aspx

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace Sheng.Winform.Controls
{
    public class DragHelper
    {
        [DllImport("comctl32.dll")]
        public static extern bool InitCommonControls();

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        public static extern bool ImageList_BeginDrag(IntPtr himlTrack, int
            iTrack, int dxHotspot, int dyHotspot);

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        public static extern bool ImageList_DragMove(int x, int y);

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        public static extern void ImageList_EndDrag();

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        public static extern bool ImageList_DragEnter(IntPtr hwndLock, int x, int y);

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        public static extern bool ImageList_DragLeave(IntPtr hwndLock);

        [DllImport("comctl32.dll", CharSet = CharSet.Auto)]
        public static extern bool ImageList_DragShowNolock(bool fShow);

        static DragHelper()
        {
            InitCommonControls();
        }
    }
}