Question : Looking for a control to visibly show capacity of components

I don't even know if anything exists, but thought I'd ask. I am building a form with a couple of slider bars. These bars let the user play "what if" scenarios. As they move the slider bars I'd like to show the results in a bar similar to something I've seen in iTunes. The attached jpg file is what is used in iTunes. Surely someone has used something to do what I am attempting. Any suggestions are greatly appreciated.

Answer : Looking for a control to visibly show capacity of components

I had a few minutes free and it's been a while since I had the time to do anything fun, so I added a capacity bar to the progress bar sample.

It's pretty simplistic and really only serves as a proof of concept.  There are a number of ways in which it could be improved (i.e. addition of graphics, more percentages, etc), but it gives you the idea.  

Coding is pretty crude at this point as well, but it works.

JimD.

ProgressBar.zip (27 KB) (File Type Details) 

Updated progress bar example.