Hi, Im in need of some procs that can read/write to a RS232 port, with any bps from 300 to 19200.
Better if using direct port access (in/out), but its ok if using windows specific functions.
What I need to do, is to read a stream of 8 bytes and every time I got a call, I need read more 8 bytes.

Anybody has any snipet made that can share with me? Or give me directions on where to research.

Last time I worked with RS232 was about 8yrs, using TASM with DOS interrupts!

Thank you

Since Microsoft discontinued the WM_COMMNOTIFY, it is much more difficult to handle serial communications.

There are 2 ways to do serial communications. The first is overlapped I/O which does not suit me at all and the second is to do polling in a thread. This is what i am doing.

Apparently there is a third option to write your own driver and create your own events.

If you want to mess around with overlapped I/O, this article provide a decent guide:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnfiles/html/msdn_serial.asp

Kind of tedious programming, but it works. I used the techniques described there myself when developing a small utility to get the phonebook out of my mobile phone.

Cheers,
+L