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Hi,
I have created a software that controls a door access system through my parallel port. I have managed that writing to the parallel port using a IO.DLL file. The software works fine in Windows 98 however when I tried to use it in Windows 2000 it crashes. The parallel port doesn't work in Windows 2000. Any ideas why is that? Any possible solutions that I can overcome this problem?
Please advice!
Thanks,
H.
Windows 2000 is a lot stricter when it comes to low level device access. However, I believe that you can use the Win32 API to do Parallel Port access. Try looking at the CreateFile() call, and related functions (I think, dont quote me).
Z.
Yeah, open "LPT1:" for Binary access. It should do the trick. Simply PUT a byte to it.
Can you please send me some code examples of sending a BYTE to the paraller port (..for Windows 2000)?
Thanks a lot!
H.
There's a really easy way that I can't believe slipped my mind - the msComm control. Gives you access to the serial, ps/2, and parallel ports. You should do a Google on how to find it.
I've helped a friend of mine out with his final test. He had to interface from VB to the parallel port too.
The problem with the NTFS system could be the following:
1) Win2000,XP,NT work with the NTFS filesystem. This makes a big difference for programmers. They have to communicate through the HAL layer. It's just different than in Win98 let's just say it that way. You'll have to find a new dll file wich is appropriate for your OS
2) XP, Win2000 just crash when you try to open a connection with the parallel port without something connected to the system's port.
I hope I was helpfull,
Pieter
http://www.geekhideout.com/iodll.shtml
This is techman's great post a bit lower in the forum! Great job!