Circle tank

[paul_a_cardinale]

That's a built-in control.  You can customize it, but I can't think of a way to use that to make the fill round.

[paul_a_cardinale]

Here's a way to do it.  I took a vertical slide, widened it to a square, then dropped on it a .GIF file that's an image of a transparent circle in an gray square.

[CDreher99]

Hello,

great idea pcardinale.

I think you can create a Pict Ring-Indicator and draw your own tank pictures.