[PD] how to tell if pd is in the background/foreground

[Rich E]

Hi all,

Anyone know how to tell (on OS X) if pd is in the background or foreground
from C?  I'm messing with Thomas' [wacom] external, trying to get it to keep
the tablet disconnected from the cursor, but it resets every time pd goes to
background.  So, if I can figure out from the external when pd goes back to
the foreground, I can reset it there, at least.

regards,
Rich
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