Volume control Question

[Buddyb3ar22 at aol.com]

I was wondering is there was a way to control the volume of something with a 
slider so that if the slider was one the value 0 there would be no sound, and 
if it was on 100, the sounds was as high as it could go
 
For the script, I tried something like "set the playLoudness of player 1 to 
value" Which obviously didn't work, and so yeah, I'm asking for your help... 
again