Detecting free HDD space

How do I detect free disk space on a HDD ?
Thanks

[Jason Teagle]

Check out the GetDiskFreeSpace() API call.

[Lothar Haensler]

just want to mention, that GetDiskFreeSpace is considered obsolete. The new GetDiskFreeSpaceEx works for even really big disks.

[Jason Teagle]

OK, thankyou. We are still using VC++ V4.0 at work, so that method isn't available, but you're right - if it is there, you should use it.