MapObject闪烁的问题（线闪烁），寻求帮助(C++ Builder6.0)

[dongliangyu]

我想让地图上的“长江”闪烁，可是闪烁的不是线，而“长江”上的一个点，纳闷 ，麻烦大家帮我看看，谢谢
IMoMapLayerPtr lyr=(IDispatch *)CreateOleObject("MapObjects2.MapLayer");
lyr=MapOBJ1->Layers->Item(Variant(0));

IMoRecordsetPtr recs;
recs=lyr->SearchExpression(WideString("NAME like '长江'"));
if(recs)
{
ShowMessage("Successful !");
}
recs->MoveFirst();
IMoLinePtr line;
IMoFieldPtr fld;

fld=recs->Fields->Item(TVariant("shape"));
line=fld->Value;
MapOBJ1->FlashShape(line,4);