I have a Diagram and I can drag items from a Tree view into and drop on a link (similar to the FlowGrammer example).
Overriding GoView.DoInternalDrag is not what you want to do, since that gets called for all drag-and-drops that start within that GoView, including cases that you don’t care about.
I understand what GoView.selection is but I am finding in OnObjectSelectionDropped there is nothing in GoView.Selection.
Wait – are you talking about an internal drag-and-drop, or an external one? An internal one starts and finishes in the same GoView. An external one starts in some other Control.