change variable for a plot interactively with "scrollbar"?

Hi

I have som 2D and 3D plots where I would like to change some parameters/constants interactively so that the plot updates automaticly.

I expect that some sort of scroll bar could be used to change a constant interactivly but I need a little help for what it is called in maple and a hint for how it is programmed.

Thanks in advance

regards Brian