Display of Sewed Surface

Hi, All

I have a question about display of sewed surface and its original faces:

First I make a selection mode (using the below code:

Handle_AIS_InteractiveContext(myAISContext); myAISContext = GetDocument()->GetAISContext();

mySelectMode = SelectFace;

myAISContext->CloseAllContexts();

myAISContext->OpenLocalContext();

myAISContext->ActivateStandardMode(TopAbs_FACE);

And then I use sewing methods to sew the faces selected together. I can find that the sewed surface is highlighted.

But after I choose select shell (using similar code for Face), this sewed surface is not displayed.

Could anybody give me a suggestion how to define the selection mode to make the new and old faces display together.

Thanks for any help!

Wang