Messages sent while mouse is down?

[Tim Selander]

I miss the Zynga "Pathwords" game on Facebook, so for my own 
amusement I'm trying to recreate it in Livecode.

For those who don't know the game, it had a solid screenful of 
Scrabble-like lettered tiles. Click and drag the mouse through 
adjacent letters to make words.

Without clicking, simply moving the mouse through the tiles 
(fields) triggers mouseenter, mouseleave, etc. which makes it 
easy to pick up the letters.

But when the mouse is down, it seems mouseloc() is the only thing 
I can get. Using a variable what has all the field rectangles, I 
can use the mouseloc() to ultimately identify the field under the 
pointer, but it's too slow...

Does a moving mouse with the button down trigger any other 
messages besides mouseloc()?

Thanks,

Tim Selander
Tokyo, Japan