Any ideas on how to do the alternative?  I realized that this works great as long as the X and Y axis are the same length, but if X is say 0-5 and Y is 0-500, then too much emphasis is put on Y.  So it would be much better if i could get the screen location of a point in a ScatterSeries.

I thought your goal was to get the coordinates in terms of the axis values?

e.GetPosition is getting the position in terms of the position of the mouse over the chart. The calls to GetUnscaledValue are translating those coordinates into the values of the axes that would cause a point to be plotted at that location.

If you just want the relative position of the mouse over the chart you could just use e.GetPosition() and divide it by the total dimensions of the chart. But I'm not sure why you would rather this than the axis based coordinates?

What's your goal with this functionality? What kind of effect are you trying to produce?

for reference, i actually found a much simpler method, since i know the data values of my points, i can use xAxis.GetScaledValue in asimilar way to xAxis.GetUnscaledValue in order to go the opposite direction

Not a problem, let me know if you have any other questions.

-Graham

I believe that will work, it will take some finagling on my part to get it to do exactly what i want, but that's what i needed.

Thanks for your help Graham!!