making a phone call in a program

I was wondering if there was any way to make a phone call from inside a program? I've seen programs that allow you to call people from your computer as long as you're connected to the phone line, but I was wondering if anyone here has ever seen functions or a library for doing just that?

well, that just answered my own question:

for anyone else interested:
http://msdn.microsoft.com/library/de...gphonecall.asp