Thread: c++ sound

I'm Just a beginner to c++, I have borland compiler version 3
and i just wanted to add some simple sounds to a console program. I saw a post that had something like.....

#include <dos.h>

main()
{
sound(7);
delay(100);
nosound();
return0();
}

I tried this but the compiler says
:call to undefined function sound

can you help????