mx.controls.VScrollBar Support for setting position

I am testing a Flex application and in my application is a VScrollBar [mx.controls::VScrollBar object],

I don't see an obvious method to set the scrollBar to a specific position or to Min/Max. Does such a method exist?

The properties I see which are somewhat useful, wMax, wMin, wPosition which all return a value.

I could write a custom method to keep clicking the up or down arrow but i was hoping to not have to do this.

Thanks,