>>You can always tell them to install the volume control to the system tray and have them access the volume from the system tray applet.
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>Having the ability to open the volume control from the system tray would actually work great. In this case the applet is installed. All I really need is the ability to call the applet so the user can turn up the volume when entering a specific screen and then call it again when leaving the screen so they can turn it back down.
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Yep - they just click on the speaker in the tray. Maybe a message to that effect might be in order - the moral equivcalent of an alarm clock blaring "Time to make the doughnuts!" at 4AM.

>Do you have any info on accessing the applet from the system tray, or any links to info on it. I have been trying some searches but have not found anything.
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Nope, because I've never required my users to install the applet to the systray - I leave their choice of control to them, and do, when I think there's a need for them to address something via a Control Panel Item, give them a means to get there. If they've got a speaker control, they need never hit the Control Panel Applet; I have no way of even knowing if they have power to the speakers, or speakers attached, so it's pointless for me to force a decision on them.

Who knows - they might even have this aplifier knob on their speakers that might need a twist to the left or right to make the adjustmengt - that's the case with the Cambridge Soundworks FourPointSurrond on my PC that plays DVDs for me at lunchtime. Having access to the CPL isn't going to shoot out a little arm to twist the knob for me - I need to remember to do that when I start to play a movie.

I can be contacted by email if you'd like to contract my services to research this for you.

I've given you the obvious answer from my POV - offer a menu point accesss to the control panel, and a section in your on-line help on "Adjusting the sound" might be in order.