Detect scroll activity (when LC is not frontmost)

[Richmond Mathewson]

Sorry: late to the party!

A rawKeyDown message IS recieved even IF the mouse is NOT in the 
LiveCode window, BUT
the LiveCode window MUST be the front window.

A rawKeyDown message won't be recieved IF the mouse is NOT in the 
LiveCode windows if
it comes from a mouse button, scrollwheel or track ball.

The micro trackball on the top of my Macintosh mouse sends these 
rawKeydowns:

Left: 65310 . . . . . . Left Arrow Key: 65361

Right: 65311 . . . . . . Right Arrow Key: 65363

Forward: 65308 . . . . . . Up Arrow Key: 65362

Back: 65309 . . . . . .Down Arrow Key 65364

Richmond.