I'm not really up on VB drag-and-drop operations, but I do know that what you get when you drop a Notes document is link information to the document. Your control would have to interpret that information, which includes server name, database replica ID, view UNID and document UNID, and use one of the Notes programming APIs -- OLE would be my choice since you know the Notes client is already running. Java/CORBA is another choice. You'd have to write code to locate the document and read information from it. It's a fair bit of code that I don't have time to write for you right now. Search around -- maybe someone's already done it and you can swipe it. Never write what you can steal, is my philosophy.
This was first published in October 2003