Set the DOS system time.
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 Syntax

        GT_SetTime(<cTime>) --> lSetOk

 Arguments:

      <cTime> is a string parameter that is a time in the same format
      as that returned by the Clipper Time() function.

 Returns:

      If the time was set ok, GT_SetTime() returns true (.T.), if not
      it returns false (.F.).

 Description:

      GT_SetTime() can be used to set the DOS system time to a new
      value.

 Examples:

      // Set the DOS system time to midday.

      ? GT_SetTime("12:00:00")

 Source: SETTIME.C

 Author:  Dave Pearson