No it is not a reseved key.
You can use for your own variables and/or functions
[code=thinbasic]
Uses "console"
Dim wait As Long
wait = 123
PrintL wait
WaitKey
[/code]
thinBasic uses SLEEP in order to put your script in sleep for a period. In any case it is not suggested to use sleep because script execution stops for the number of milliseconds indicated.
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