The PFProgressBar.NET is a control to show a state or progress. The orientation
can be horizontal or vertical, the rendering is customizable by ProgressBarRenderers.
The control offers a ProgressBarRendererXP and a ProgressBarRendererGradient
for rendering. The colors of this renderers can be changed, custom renderers can
be implemented for a complete customization.
With the special ProgressBarRendererBattery you can change the appearance
of the ProgressBar to a battery-meter. The marks for the colors red, orange, yellow
and green can be set by properties of the renderer.