求助：想在ArcTOCControl 中自由拖动图层用什么接口

<P>我想在ArcTOCControl 中自由拖动图层使其可以互换位置用什么接口啊？谢谢</P>

没人回答啊？？？？？？？？？？？？？？？

9.2中已经做好了拖动了

使用ArcTOCControl的鼠标事件MOVE,DOWN,UP.获得拖动图层和要移动的位置,然后移动图层就可以.

我是9。0的，高手有没有例子参考一下，万分感谢！！！！

<P>Mousedown事件中调用HitTest成员,</P>
<P>  <CODE><FONT color=#0000ff>Dim</FONT></CODE> pMap <CODE><FONT color=#0000ff>As</FONT></CODE> IMap<BR>  <CODE><FONT color=#0000ff>Dim</FONT></CODE> pLayer <CODE><FONT color=#0000ff>As</FONT></CODE> ILayer<BR>  <CODE><FONT color=#0000ff>Dim</FONT></CODE> pOther <CODE><FONT color=#0000ff>As</FONT></CODE> IUnknown<BR>  <CODE><FONT color=#0000ff>Dim</FONT></CODE> pItem <CODE><FONT color=#0000ff>As</FONT></CODE> esriTOCControlItem<BR>  <CODE><FONT color=#0000ff>Dim</FONT></CODE> pIndex <CODE><FONT color=#0000ff>As Variant</FONT></CODE><BR><BR>  <CODE><FONT color=#008000>'Determine what kind of item has been clicked on</FONT></CODE><BR>  TOCControl1.HitTest x, y, pItem, pMap, pLayer, pOther, pIndex<BR></P>

<P>private void axTOCControl1_OnMouseDown(object sender, ESRI.ArcGIS.TOCControl.ITOCControlEvents_OnMouseDownEvent e)<BR>  {<BR>   if(e.button==1)<BR>   {<BR>    <BR>    esriTOCControlItem pItem=new esriTOCControlItem();<BR>    IBasicMap pMap=new MapClass();<BR>    ILayer pLayer=null;<BR>    object other=new object();<BR>    object index=new object();<BR>    //ILegendGroup pLegendGroup;<BR>    pSelSymLayer=null;//当前需要移动的图层<BR>    axTOCControl1.HitTest(e.x,e.y,ref pItem,ref pMap,ref pLayer,ref other,ref index);</P>
<P>    if(pLayer==null)<BR>     return;<BR>     //MessageBox.Show("player=null!");<BR>    if(pItem==esriTOCControlItem.esriTOCControlItemLayer)<BR>    {<BR>     if(pLayer.GetType() is IAnnotationSublayer)<BR>      return;<BR>      //MessageBox.Show("annotationsublayer!");<BR>     else<BR>     {<BR>      //MessageBox.Show("ok!");<BR>      axTOCControl1.MousePointer=esriControlsMousePointer.esriPointerHand;<BR>      pSelSymLayer=pLayer;<BR>     }<BR>    }<BR>    else<BR>    {MessageBox.Show("mousedown!");}</P>
<P>   }<BR>  }</P>
<P>  public void axTOCControl1_OnMouseMove(object sender, ESRI.ArcGIS.TOCControl.ITOCControlEvents_OnMouseMoveEvent e)<BR>  {<BR>   <BR>   IBasicMap pMap=new MapClass();<BR>   ILayer pLayer=null;<BR>   esriTOCControlItem pItem=new esriTOCControlItem();<BR>   object pOther=new object();<BR>   object pIndex=new object();<BR>   //实现调整图层顺序功能<BR>   if(e.button==1)<BR>   {<BR>    axTOCControl1.HitTest(e.x,e.y,ref pItem,ref pMap,ref pLayer,ref pOther,ref pIndex);<BR>   }<BR>   if(pItem!=esriTOCControlItem.esriTOCControlItemNone)<BR>   {<BR>    //ESRI.ArcGIS.Utility.COMSupport.OLE.GetIPictureDispFromIcon(icon);<BR>    axTOCControl1.MousePointer=esriControlsMousePointer.esriPointerCustom;<BR>   }<BR>  }<BR>  <BR>  private void axTOCControl1_OnMouseUp(object sender, ESRI.ArcGIS.TOCControl.ITOCControlEvents_OnMouseUpEvent e)<BR>  {<BR>   esriTOCControlItem pItem=new esriTOCControlItem();<BR>   IBasicMap pMap=new MapClass();<BR>   ILayer pLayer=null;<BR>   object pOther=new object();<BR>   object pIndex=new object();<BR>   int i;<BR>   //bool bUpdataToc;<BR>   axTOCControl1.MousePointer=esriControlsMousePointer.esriPointerArrow;<BR>   //实现调整图层顺序功能<BR>   if(e.button==1)<BR>   {<BR>    axTOCControl1.HitTest(e.x,e.y,ref pItem,ref pMap,ref pLayer,ref pOther,ref pIndex);<BR>   }<BR>   if(pItem==esriTOCControlItem.esriTOCControlItemLayer||pItem==esriTOCControlItem.esriTOCControlItemLegendClass)<BR>   {<BR>    if(pLayer==null||pSelSymLayer==null||pSelSymLayer==pLayer)<BR>     return;<BR>    if(e.button==1)<BR>    {<BR>     for(i=0;i<pMap.LayerCount;i++)<BR>     {<BR>      ILayer pLayTmp;<BR>      pLayTmp=pMap.get_Layer(i);<BR>      //得到当前点击的索引值<BR>      if(pLayer==pLayTmp)<BR>       continue;<BR>     }<BR>     ((IMap)pMap).MoveLayer(pSelSymLayer,i);<BR>     axMapControl1.ActiveView.Refresh();<BR>    }<BR>   }</P>
<P>  }</P>
<P>请问我拖动图层都没反应，程序那里有问题啊？还有ESRI.ArcGIS.Utility.COMSupport.OLE.GetIPictureDispFromIcon(icon);启动出错显示受到保护限制但是我已经把函数改成public了。请高手指点！！！！</P>

<P>请帮帮忙啊！！<IMG src="http://www.gisempire.com/bbs/Skins/default/topicface/face2.gif" align=absMiddle></P>

<P>我倒是可以拖动了,基本原理一样的,移动的时候添了一个label对象,使之随着鼠标移动用来标志移动位置,但是TOC屏幕会不停的刷新,很不爽!</P>

能把你的代码贴一下吗？我对比看看哪出问题了。