Set Sound Class Volume Modifier

Hi guys,

Is there a way to do a Set Sound Class Volume Modifier ? Does i need to create the node in c++ ? If yes, can you show me how to create plugin externaly of my project ?
I just want to create a HUD and set FX volume, Main volume, …
I saw the plugin VictoryPlugin, but i don’t find a way to install it in my version (4.10)

Is anybody can help me ?

Monstreur.

Up plz, i really need it !