usb port How to simulate a serial port

Dear everyone,

Our card (use rs232)add a usb interface ,I need add so much codes for host to accessing our card. now i want to write a driver for simulate a serial port,So my host applicate do not need update so much! How can i do? Can anyone provide any ideas for me?

regards!

anbo
???y˫???+.n?+???u?ڲ˛??^r*D???kN???r??zǧu??jy???^j???ׯ??? 0?j?b??(??(

Dear everyone,

Our card (use rs232)add a usb interface ,I need add so much codes for host to accessing our card. now i want to write a driver for simulate a serial port,So my host applicate do not need update so much! How can i do? Can anyone provide any ideas for me?

regards!

anbo
???y˫???+.n?+???u?ڲ˛??^r*D???kN???r??zǧu??jy???^j???ׯ??? 0?j?b??(??(