oFileTest = CREATEOBJECT('tmrFileCheck')
oFileTest.Enabled = .T.

DEFINE CLASS tmrFileCheck AS TIMER
*
Interval = 60000  &&--Check every 60 seconds

PROCEDURE TIMER
*
This.Enabled = .F.
IF FILE("C:\ZipDump\Skippy.zip")
  *--Do some stuff
ENDIF
This.Enabled = .T.
ENDPROC

ENDDEFINE