Firing DragDrop Event ba dropping a file on a Map

Hi experts,

I would like to know, how I can fire a Map Event by drag-dropping Windows files (any type) on a Map (not the TOC). This should later facilitate the linkage of file(s) with shape layer objects (this part is already functional but today's configuration of those links can be highly simplified by drag&drop technology). I read something about the fact, that the Map inherits the event from Windows Form but I cannot figure out, how to wire it up.

Any Help?

Ralph