I have a db Tee Chart showing a line series based upon a TQuery as
datasource.

I would like the end-user to be able to 'click and drag' a portion of
the graph, to select a group of datapoints that would then be
exported somewhere......

I know how to get the data from a single point if someone clicks on a
series, but the functionality I am envisioning is when someone clicks
and drags the mouse, I'd get a color change on the portion of the
chart that is being selected as a visual reference.
I'd also need to be able to figure out at what point they lifted the
mouse button, and of course, I can't count on them beginning their
selection right on top of a data series.
Can anyone point me in the right direction?

Thanks!