为什么attach了还是不行？

<P>Dim newobj As New MapXLib.Feature </P>
<P>Private Sub Command1_Click()<BR>newobj.Attach Map1<BR>newobj.Type = miFeatureTypeSymbol<BR>newobj.Point.Set 115, 19<BR>'now add the object to a layer<BR>' obj will be the newly added object<BR>' you can still use newobj to add more objects<BR>Map1.Layers("gps").AddFeature newobj<BR>End Sub</P>
<P>Private Sub Command2_Click()<BR>newobj.Attach Map1<BR>newobj.Offset 1, 1<BR>newobj.Update<BR>End Sub</P>
<P><BR>问题：为什么我按command2是它说不能对独立图元操作？ </P>

<P>Private Sub Command2_Click()</P>
<P>dim ftrtemp as feature<BR>set ftrtemp=newobj</P>
<P>ftrtemp.Attach Map1  '这句好像可以不用吧<BR>ftrtemp.Offset 1, 1<BR>ftrtemp.Update</P>
<P>map1.refresh<BR>End Sub</P>
<P>我之前想update的时候也是有这种情况，上面这种办法我试过可以的</P>

<P>你的程序看懂了，请问我的程序问题在哪？</P>