Problem with Open command on printer port

[PPGA]

I am using the Open command perfectly to open the virtual port of a printer (USB) as follows:

Open "\\vmxp\generic" For Output As #1

Now I intend to ask the user for the path of the virtual printer, but I receive the message "Path not found" when I try to use it as a parameter in the command line as follows:

Open "'\" & txtportname.Text & "'" For Output As #1

The syntax with parameters should certainly not be like this, so I would like to know what is the correct way to use the Open command?

Thank you all for your support and I look forward to hearing from you.

[Arnoutdv]

Why do you have “‘\” at the beginning of the command?

[PPGA]

Why do you have “‘\” at the beginning of the command?

I am sorry!

I'm typing the following syntax in the code below, but with error!

txtnomeporta.Text = "\\vmxp\generic"

Open "''" & txtnomeporta.Text & "'" For Output As #1

[Arnoutdv]

Why enclose the text between “ in the Open command??