Yes, looking for the filehandle to close is what I tried first, but it appeared it wasn't ever closing unless I closed it myself.  SO I needed a way to determine when I could safely close it, and this is what I came up with.  I'm sure there must be better ways; I just haven't come up with one that works yet and still allows me to periodically poll it, rather than just waiting on it and blocking until it terminates.  I need to balance "only one player child is allowed to run at a time" vs. "the rest of the app must not block while waiting for the player to exit".

In reply to Re^4: Dynamically altering Tk buttons by Llew_Llaw_Gyffes
in thread Dynamically altering Tk buttons by Llew_Llaw_Gyffes

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