If it even would work, you would have do somthing like this.
<Text Name='ValueHolder'... DynamicDatat='what erver dada u want'>.456</Text>
<What_ever OnHoverIn='(line 1 convert math) Progress_bar.Position=ValueHolder.LocalText' />
Somthing along those lines is what your looking for but as Deathbane said it's porb not going to fly
.