Sleep
Tcl_Sleep(3)                Tcl Library Procedures                Tcl_Sleep(3)
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NAME
       Tcl_Sleep - delay execution for a given number of milliseconds
SYNOPSIS
       #include <tcl.h>
       Tcl_Sleep(ms)
ARGUMENTS
       int          ms                 (in)      Number   of  milliseconds  to
                                                 sleep.
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DESCRIPTION
       This procedure delays the calling process by the number of milliseconds
       given  by the ms parameter and returns after that time has elapsed.  It
       is typically used for things like flashing a button, where the delay is
       short  and  the  application  needn't  do anything while it waits.  For
       longer delays where the application needs to respond  to  other  events
       during  the  delay, the procedure Tcl_CreateTimerHandler should be used
       instead of Tcl_Sleep.
KEYWORDS
       sleep, time, wait
Tcl                                   7.5                         Tcl_Sleep(3)