Texto retirado deste forum
http://www.vbforums.com/showthread.php?643913-RESOLVED-Writing-to-parallel-port-Windows-7-64-bit em que afirmam ter conseguido a comunicação com a porta paralela.
Re: Writing to parallel port - Windows 7 64-bit
I finally got inpoutx64.dll working. My fault it took so long; I should learn to read the instructions
In case anyone else needs to write to their parallel port under Windows 7 64-bit, here's what you do:
Go to
http://www.highrez.co.uk/downloads/inpout32/default.htm scroll down the page and click on the Binaries only - x86 & x64 DLLs and libs link. This will download InpOutBinaries_1500
.zip. Once downloaded, unzip and go to the Win32 folder and double-click on InstallDriver.exe. You will get a UAC message asking if you want to allow the program to make changes. Answer Yes at your own risk ...
There is also a VB.NET test program on the highrez downloads page. Click on .NET 2.0 (2005) Example code to download it. It works fine in VB.NET 2010 Express.
To use the dll in your own programs, copy inpoutx64.dll into your debug folder. You will obviously need to distribute the dll with any published package you produce.