[求助]关于IGraphicsContainer::FindFrame方法

<P>我用以下代码得到的FrameElement总是null</P>
<P><BR>            IGraphicsContainer pContainer = axMapControl1.ActiveView as IGraphicsContainer;<BR>            IFrameElement pElement = pContainer.FindFrame(axMapControl1.ActiveView.FocusMap);</P>
<P>麻烦帮我看下吧，谢谢</P>

<P>伙计，你看看我的做法吧？</P>
<P> IGraphicsContainerPtr ipGContainer = m_wndMapCtrl.GetMap();<BR> <BR> IElementPtr ipElement;<BR> while (SUCCEEDED(ipGContainer->Next(;ipElement)) ;; NULL != ipElement) {<BR>  <BR> }</P>