Quote Originally Posted by RoboTact
Install some newer service pack (it is available up to SP6 for VS6).
A service pack won't help - you will need the latest SDK, it's available for download from MSDN.

And BTW, stoneyrh: The Windows version you're currently running under is irrelevant - the important thing to do in order to use the newer APIs is, as VictorN already mentioned, to #define _WIN32_WINNT to be at least 0x0500 - before #including Windows.h. Note that the consequence of this will be that your app will now require at least Win2K to run.