How to Verify That There is an Icon Under the Mouse?

[August]

To summarize:

My initial approach was to simulate with KBM the actions that I was doing manually. Hence, I thought that before right-clicking on an icon, I should verify that there was an icon there to accept the right-click. I wanted a right-click to be able to access the Open With menu. But KBM has a built-in "Finder Open With" action which will do what I want in a single step and has all the proper validity checking built in. It won't run if there is no selection in Finder.

@Nige_S

It's all too easy when making a macro to to fall into the "I'll get KM to emulate what I do" trap. That often means we're playing to our weaknesses rather than KM's strengths and, importantly, we're trying to automate the GUI when we really shouldn't:

GUI automations are much more fragile than "programmatic" macros -- they usually rely on the GUI being in a known state and can be broken by an accidental mouse click, your email client popping to the front, even an unusual sort order in a window. While you can try and catch many of these it's a lot more, often unnecessary, work.