send data by LPT port

If you have installed a generic printer text driver and have that set to the LPT1 port (pretty standard) , then you can print to LPT1 as if it was a file.

System.IO.StreamWriter writer = new System.IO.StreamWriter(@\\.\LPT1);
writer.Write("Hello World");
writer.Flush();
writer.Close();

You should read the Code Project article on parallel ports[^].


You can also find a lot of info on parallel ports here[^].

[added]
The above example code is in C#. For something in Visual Basic look at this article[^]
Read this Code Project article[^] on printing using Visual Basic.