I wanted to keep the look and feel of the application the same. I did want to use two separate bars. I wanted to create a control using one type of bar but controlling the behavior using public properties.

I finally used the windows bar instead of the Infragistics bar sacrificing all of the appearance customizations I could do for the exact functionality I needed.

The marquee should work exactly like the windows marquee style. This would be used if you had a seperate thread running on which there wasn't a fixed number of tasks. It would also be used if on a seperate thread tasks were running but the tasks did not return any indicator of their status other than if it was running or complete.
 
It would be used where ever the normal Infragistics progress bar was used. I don't think switching between marquee and progress would be useful as it would probably confuse the end user as to what was happening.
 
The marquee would work similar to the windows mode where it bounces back and forth. While controling the animation speed would be a nice feature I don't think it would be a requirment. The end user just needs to see that it is moving.
 
I hope this helps.

 Thanks for the reply. I'll submit the request.

After reading my post I realized I meant to ask if it was possible to have the Progress Bar style similar to the Marquee style of the default visual studio Progress Bar?