Thanks for the link. I know how to implement it. I've been using DnD for over 12 months now in a big project.

More info.

If I run the exe from Explorer (Windows) after dropping the dll dependencies into the debug dir, then DnD works just fine, for BOTH 4.6.1 and 4.6.3 builds.

If I run the SAME executable from the 4.6.1 Creator gui, then DnD does work.
If I run the SAME executable from the 4.6.3 Creator gui, then DnD does NOT work.

In other words, I think there is something wrong with 4.6.3 Creator.

I do have both Create 4.6.1 and 4.6.3 installed. Perhaps that is a problem?
I'll remove 4.6.1 in a moment to see what happens.