How to create macro to capture the session screen and beep if condition met?

I would like to create the macro the refresh every several mins to monitor the job status, once "MSGW" appears the macro should know "beep" me.. then I can do other things without monitoring the session all the time. The tech points is that I dont know how to compare the strings in the screen and don't know how to trigger beep in the macro..

Sam

 I've coded the sample to prompt message for message wait job, but I do want to "Beep". anyone know it?  the current screen will be on the work job screen, e.g. wrkusrjob xxx *active. then this macro is applied to monitor this screen.. by refreshing every 3 secs, prompts warning ifmessage wait job found.
 
[PCOMM SCRIPT HEADER]
LANGUAGE=VBSCRIPT
DESCRIPTION=
[PCOMM SCRIPT SOURCE]
OPTION EXPLICIT
autECLSession.SetConnectionByName(ThisSessionName)
 
REM This line calls the macro subroutine
 
subSub1_
 
sub subSub1_()
Dim MsgInd
Dim MsgRow, MsgCol
Dim MsgJob
Dim MsgBody
 
MsgInd = False
MsgRow = 1
MsgCol = 1
 
MsgBody = "prompt message"
 
Do while MsgInd=False
   autECLSession.autECLOIA.WaitForAppAvailable   
   autECLSession.autECLOIA.WaitForInputReady
   autECLSession.autECLPS.Wait(3000)
   autECLSession.autECLPS.SendKeys "[pf5]"
   MsgInd = autECLSession.autECLPS.SearchText("MSGW",1,MsgRow,MsgCol)
   If MsgInd Then
	MsgJob = autECLSession.autECLPS.GetText(MsgRow, 7, 10)
	Msgbox MsgBody,,"Batch Monitor" 
   End if
Loop
 
end sub

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