Yeah, many think that the clipboard is a fairly simple thing, but that's actually very far from the truth. When you start thinking about it, it's actually rather amazing that it does some of the things it does.

One thing that's pretty cool is that it works hard to find a common format when copying-pasting between two entirely different programs. And just to be able to handle all the different formats, and to also have them nested to any level you like, is rather amazing. Just think; you can take a VB6 form maybe with frames and pictureboxes on it that also have controls (nested to any level you want), and then draw a carat-box around them to select them, and then Ctrl-C, and voila, they're all in the clipboard, all organized just as they should be.

Also, certainly copies to the clipboard can be quite memory intensive.

I've messed around a bit with clipboard-stack type programs in the past, but always given up when I realized how difficult it would be to make a truly universal clipboard-stack program. Also, it'd almost certainly require some kind of disk-cache so that it didn't overflow memory. Ideally, you could set limits as to how much it'd store in memory versus flush it to disk-cache. It all just winds up being a monumental undertaking.

Also, just as an FYI, VB6's access/use of the clipboard (via its clipboard object) is fairly primitive considering all that the clipboard actually does.

Best Regards,
Elroy