3 slider control for a Gantt Chart

Hi

I need a "3 side" slider mechanism for a Gantt Chart. I have not been able to attach an example, but you should be able to view video clip of the requirement at:

http://www.perceptiondynamics.info/e...ing_slider.mp4

Basically, you can move either the start, finish or the body of the slider.

A while back a programmer produced the slider in the video for me. The problem was that it was an ActiveX contol that had to be registered on the machine using it. It became so flaky and non-transportable that I gave up trying to use it.

The principle of the control in the video is fine. In theory, something similar could be created by using three thin slider controls, one above the other, on a user form. In practice, this would be too bulky and inflexible because it neeeds to fit in a single row on a spreadsheet.

I would have thought it was a fairly general requirement. However, I cannot find anything suitable. The main thing is that it needs to be as portable as possible and work on different machines and different versions of Excel

I would really appreciate any ideas - because I am really stuck on this one

Thanks