Link Handle

I have a GoLabled Link, which the user selects, and I have then added a point to it using InsertPoint.
How can I have the handle at that point displayed immediately (given that the link is selected)?
i.e. currently the user has to select something else and then reselect the link to make the handle appear.

The FlowLink class in the Processor sample has this method:
public void InsertPoint_Command(Object sender, EventArgs e) {
. . .
s.InsertPoint(i+1, closest);
if (this.Orthogonal) // when orthogonal, gotta insert two points
s.InsertPoint(i+1, closest);
s.AddSelectionHandles(v.Selection, this); // assume selected
v.FinishTransaction(“inserted point into link stroke”);
. . .