Tracking a graph's scrollbar

I've looked through the properties and the help for this one...

I'm just wondering if there's a way to programmatically get the
position of the x-scrollbar on a graph, in order to set a string
indicator.

For example, say a unit needs to do the same test, but in both
directions (CW, CCW).  I have kept a continuous plot, which
extends over the plotting area of the graph, thus providing a use for
the scrollbar.  I'm just wondering if there's a way to know where
that scrollbar is, in order to tell the user that they are looking at
CW, or CCW data.  So when the scrollbar reaches a certain point,
the direction changes.

I have done this a different way before, plotting one direction of the
graph, storing that history, and then plotting the other direction on
the same graph, storing that history, and then have the user select
from a listbox which direction they want to see, but if I could get the
scrollbar position, this would be far easier.

Thanks for any suggestions/help.
.

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