<P>ControlsSceneSetObserverTool 结合<a href="ms-its:esriSystemUI.chm::/ICommand.htm" target="_blank" ><STRONG>ICommand </STRONG></A>和<a href="ms-its:esriSystemUI.chm::/ITool.htm" target="_blank" ><STRONG>ITool</STRONG></A> 怎么用？？</P>
<P>能不能给个例子说明下..</P>
