[Dev-C++] Program wait from 25 to 40 min. How to ?

[<we...@ha...>]

Hi,

I'm trying do my program sleep from 25 to 40 min. I tryed use the funcion
sleep() but i can't do it. :/

Someone know how to do it ?? Can gave-me a example ??

Thkz a lot.

Best Regards.

[ ]'s