[Dev-C++] HELP!

[<ste...@ge...>]

When I use;
PlaySound("NIMclick.wav", NULL, SND_SYNC);
DevCpp says;
140 main.cpp - implicit declaration of function `int PlaySound(...)'

I have no idea what to do! I once got help with this problem, but I have =
lost all my sourcefiles and therefor I'm totally lost. Please help =
somone :)

Thanks, Stein