Since build 1944 after a send operation you can identify the sent type (sendon, sendback, sento) selected in the dialog. Use this syntax:

Dim selected As Copy Flow Items Control.Send Item = sendDialog.Send Items.Find(Function(si) si.Is Selected) 

msgbox (selected.Type)

Find the type of send in selected.Type.

Possible values are:

•Copy Flow Item.Transition Type.Send Back

•Copy Flow Item.Transition Type.Send On

•Copy Flow Item.Transition Type.Start

•Copy Flow Item.Transition Type.Unknown (meaning send to)