That's all I've ever used it for.<BR><BR>Anyway, typedef is useful, but I think that many C and C++ APIs severely over use it. For example, right now, I'm coding a QuickTime app on MacOS X using ...

In the above a is a variable whose type is A, and similarly for b and c. Also I think names ending in '_t' are all reserved, so you're not supposed to use them. Not that that stops anyone.