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REM | choice /c:delay /td,15>NUL
(In Batch files) waits 15 seconds, then resumes with next line. Delay may range from from 1 - 99 seconds.
http://www.allenware.com/icsw/icswref.htmog
Pipe REM to block Standard Input
A really useful trick is to use use REM combined with piping, as in:
REM | CHOICE /C:AB /T:A,5 > NUL
The CHOICE command in itself would time out after 5 seconds (/T), except if someone presses a key not specified by /C, in which case the count down would be aborted.
By using REM and piping its (always empty) standard output to CHOICE's standard input, this standard input will not receive keypresses from the console (keyboard) anymore. So pressing a button neither speeds up CHOICE nor stops it.
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