which header file is used for sound() function in dev c++

[abdullah ibrar]

which header file is used for sound() function in dev c++
actually i want header file for this code

#include< >
using namespace std;
int main()
{
sound(300);
}

[cire]

actually i want header file for this code

You should consult the documentation of whatever libraries/operating system you're using. It's not a standard function.