Parallel port sharing problem

NTDEV
1

Hi,
I am developing a printer driver for parallel and USB for win98 and win2k.
Under parallel I have this problem, when I load my driver, I am not able to communicate with the parallel port using other applications.

My setup is as below:

I have a printer driver which communicates with a Language Monitor and which communicates with Port monitor.
The Portmonitor directly communicates with the LPT port.

Under Win98 i have no parallelport driver.The port monitor directly communicates with the parallel port.

Can someone geive me some pointers on how to solve this issue where I cannot communicate with the parallel port using other applications.
thanks,
paul

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2

>> I have a printer driver which communicates with a Language Monitor and which communicates with

> Port monitor.
> The Portmonitor directly communicates with the LPT port.
> Under Win98 i have no parallelport driver.The port monitor directly communicates with the parallel port.

Even in Windows 98 use Win32 COMM functions ( or use VCOMM.VxD in kernel mode)…
USB to Parallel port (not conforming to USB printing class) devices are common and if you are directly
talking with port address your printer wont work with any of these USB to Parallel ports…
Just a thought…

Vijay