If you must wait and still need the events, then try this:

FOR x = 1 TO 5
  INKEY(.1)
  DOEVENTS
ENDFOR

Personally, I hate using this approach.

>Hi Jim,
>
>Thank for your advise.
>So, how do I implement the waitSec function ?
>
>Any problem with my code or any improvement
>that you can advise me on this issue.
>
>Thank you
>
>>Virusim,
>>
>>SLEEP() is doing exactly what it is supposed to do :
>>
>>"suspends the execution of the current thread for at least the specified interval"
>>
>>Since your OnComm() codes runs in the current thread, it doesn't :-) However, if you test the comm input after the Sleep expires, I expect you'll find your data is there.