>01) does OPOS work with parallel and serial printer, any special setting
>for parallel printer as my present one is using parallel port

Yes. You should see 2 drivers. The one for serial printer would be named something like TSP452, and the one for parallel would be named TSP452P.

>02) I also can't get the StatusUpdateEvent to work to detect the
>paper out issue.
>
>03) The Star website OPOS example does not work on my printer,
>The Star printer driver example detect my printer is a receipt printer, and removing the paper does not trigger the sensor to update the
>status.

I get same results as you.

>Their check status command is to send Chr(5) to LPT port,
>but didn't give any example how to get the status from parallel port.
>Their VB OPOS example does not work for me too when I test it on my printer.
>
>Do you had any ideal/advise on how to go about this issue. Thank a lot

Not at this point. I will keep trying and let you know if I figure anything out.