delphi - How to mute the sound of my application?

Question

I have an application which has sound. I have a global property to mute the sound. The problem is, there's so many different things which can make sound, I would hate to iterate through different class types and mute/unmute their sound. Instead, I'm looking for a way to mute the sound on a global application level. I don't mean muting the entire system volume either.

One scenario: In Windows 7, you can open the Volume Mixer and adjust the volume of individual applications. While I don't intend to change this actual particular value (as I know it's Windows 7 specific), I would like to change the volume of everything in my application all at once. I would also need the ability to completely mute the sound of everything in my application. I need this ability to be compatible with Windows XP and above. I am assuming it will involve Windows API calls, but I have no idea what calls to make.

Answer 1

XP does not support per-application volume control. That capability was added in Vista. So what you are attempting to do cannot be done in XP by fair means.

There is software called IndieVolume that retro fits per-app volume control to XP. I can only imagine it does so by means of low-level hacking, DLL injection and so on. I doubt that's really an option for you.