Highrez

Thank You for Your time. I leave my solution like it is. The risk that another process use LPT port while my app is running is pretty small these days. I have asked because I wonted to improve my software. Eeprom programmer that I have built is for people who can barely use soldering iron. It must b...

It is quite old eeprom and there is no reasonable price programmers to buy.

It is quite danger to eeprom when I connect programmer with it to LPT port and for example accidentally print some document to LPT printer. I need to make my program safe from any situation like this. I know nobody use LPT printer any more but this is only example.

I have written C# app that program some eeprom. How can I prevent LPT port from accessing by another process while my app is running? I mean something like c# SerialPort.Open(). After that any other process can't access COM port until SerialPort.Close() instruction.