Using a graph as a control

[altenbach]

Yes, cursor move events are preferred, of course.

Also in older version of LabVIEW (pre 8.0?), cursor move events were not available. If the processing takes a long time, you need to take other precautions to prevent buildup in the event queue and making the VI unusable. (This is one of the reasons we need this idea)

Here's an old example usign cursor events for a 2D spline (posted here long ago)

Note that the original pre-8.0 example was necessarily a bit more convoluted. 😄