port com: open twice?


Here is my problem: I provided a serial driver to users, they used
it, but at the same moment, another driver will try to send a request to
the same port com. The problem is I can’t send this request when users
have opened the driver port com, or in an other way, if I opened the
driver first, the user can’t opened it after.
Do you have any ideas?

ps: thanks a lot for people you sent me a response about create a
new request into the serial driver.

Oce-Industries SA
1, rue Jean Lemoine
94015 Creteil cedex France
phone: 33-1-48988121 fax: 33-1-48985450