Special caracter Error (Not Printing)

[desenvolvefacil]

I try the code

EncodingProvider ppp = CodePagesEncodingProvider.Instance;
Encoding.RegisterProvider(ppp);

Printer printer = new Printer("POS-80");

printer.Append("éçà€éçà€éçà€éçà€éçà€");
printer.NewLines(3);

printer.FullPaperCut();
printer.PrintDocument();

However, it gives an error and the printout does not come out.

I tried to print directly from Notepad, and the symbols came out normally.