Progress: Progress is a standard ProgressBar, which is not integrated in a Panel. Progress doesn't have the sunken look. The Value (between 0 and 100) indicates the length of the bar.

ProgressSmooth: ProgressSmooth is a standard smooth ProgressBar, which is not integrated in a Panel. ProgressSmooth doesn't have the sunken look. The Value (between 0 and 100) indicates the length of the bar.