The Min property allows setting a range so we wouldn't have to translate whatever values we might have into your 0 (or whatever your control's default Min is) to Max.

For instance, if I wanted a temperature scale from freezing to boiling, 0 to 100 would work for Celsius, but not Fahrenheit, which is 32 to 212. I'd rather set the range of your bar from Min = 32 to Max = 212 than have to translate my 32 to your 0. Does this make sense?

-JoeyCode