I’ll throw in my lot: Some things unlock the screen without an idle. I think 
setting the visible of a stack will do it. 

Bob S



> On Jan 22, 2021, at 12:56 AM, Terence Heaford via use-livecode 
> <use-livecode@lists.runrev.com> wrote:
> 
> Just looking for clarity with regard to lock screen.
> 
> Is there only one state for the screen, either locked or not locked and when 
> is that state changed.
> 
> ---------------
> on mouseUp
> 
> lock screen
> 
> aTest
> 
> end mouseUp
> 
> ----------------
> on aTest
> 
> — is the screen still locked here
> 
> end aTest
> 
> ————————
> 
> At what point is unlock screen called by livecode without me calling it 
> directly.
> 
> The docs say when all pending handlers have completed but what exactly is a 
> pending handler.
> 
> 
> 
> Thanks
> 
> Terry
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