Custom control box button

Question

Some Windows applications add buttons to the control box, which apparently is the name for the group of minimize, maximize, and close buttons. One such application is Skype, which has a button for switching from a one-window-that-contains-everything mode to a one-window-per-conversation mode and vice versa:

I'd like to know how you can do this. I've looked around and can't figure out how. I assume it would require P/Invoke and the Windows API, but I'm not sure what function I'd use.

Answer 1

I think one of these might be what you're looking for:

http://www.codeproject.com/kb/vb/transmenuandtitlebuttons.aspx

http://www.codeproject.com/kb/cs/mintraybtn.aspx