Hi all,

I've got some X-Y data corresponding to a series of peaks. What I'd like to be able to do it interactively click on a point on the graph to the left of the peak and a point to the right of the peak and simply add up all the y-values in between. I need to do this a few times on the same graph as I need to ignore some of the peaks.

Would anyone know of an easy way I could do that? I'm starting to learn VB so apologies for a probably very simple post!

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