Peter Schuller wrote in a message to Mikko Hyvarinen:

(cut)
 PS>    rc = DosOpen (_argv[1], &hCom, &ulAction, 100L,
 PS>       FILE_NORMAL,
 PS>       OPEN_ACTION_OPEN_IF_EXISTS,
 PS>       OPEN_ACCESS_READWRITE, 0L);

 PS> But it won't work, DosOpen return 12. Maximus passes on porthandle
 PS> "5" for COM2. Is there any specific "flag" i have to use?

Maximus has already opened the port. The handle it gives you is the one it
received from DosOpen. So, don't need to use DosOpen, you can start writing
to the port immediately with the handle you got from Maximus.

 MH> You can't find the VIO calls in the VAC++ documentation, they're
 MH> included in PRCP.ZIP that's floating around in the net.
 PS> I'll try to find that one... Thanx!

The sysop of  agreed to crash the file to your system. Should
be in your inbound before you get this message.

--- timEd/2 1.10+