There is a serial COM program here (with source) that does=
 bi-directional RS232 under all the Windows line:

http://www.crystalfontz.com/software/633_WinTest/index.html

Here is a simpler transmit only one:

http://www.crystalfontz.com/software/wintest/index.html

It would be a good start for a windows based COM program.

I do not think any DOS serial program is going to work on the=
 NT/2K/XP line, it should work under 9X/ME though

--- Original Message ---
>From: "Sean H. Breheny" <shb7@CORNELL.EDU>
>To: =A0<PICLIST@MITVMA.MIT.EDU>
>Sent: Sat, 18 May 2002 11:13:04 -0400
>Subject: [OT]: Win XP and DOS programs
>
>Hi all,
>
>I am working on a simple program (for a PC) that needs to talk=
 to a PIC
>over the PC serial port. This is something that I have done many=
 times, but
>this time, I am developing it on a Win 98 machine and it needs=
 to run on a
>Windows XP machine that I do not yet have. I will be the only=
 one using
>this program, and I'd like to be able to run it on older=
 computers, too, so
>I'd like to avoid making it a windows program. Can a regular DOS=
 program
>run under XP and access the serial port? Can it modify the PC's=
 interrupt
>vector table to install a serial port handler (which my standard=
 DOS-based
>serial routines do)?
>
>Thanks,
>
>Sean

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