KeyLoop decrements seconds and then returns an errorlevel of:
0 if the user does NOT press a key within the time limit
1 if the user presses a key within your time limit

Syntax: 
KeyLoop.Exe [Seconds] [/#KeyCharOrCode] ["your text"] [/i] [/v] [/?]

Parameter [Seconds] must when used be first parameter. Valid values 0-65535
Parameter /#KeyCharOrCode can have either one letter or a three digit code.
Option /i can be used to invert the returned errorlevel.
Option /v is used to verify abort when key is pressed.
"Your text"  @s invokes the second count, @k invokes the key to press

Example batch script:
-------------------------
@Echo off
KeyLoop 45 "Your server is starting in @s secs, press any key to abort."
If ErrorLevel 1 Goto END
Server\Server.Exe
:END
-------------------------
Press any key to terminate: 57

v0.00
v1.00
  970211 PiS -> Inverted return value, added switch /v /i, added text out
v1.20
  970213 PiS -> Corrected bug of repeated keypress
v1.21