outputto: value for encoding

[maeli64]

In a procedure, I use the command:
DoCmd.OutputTo acOutputReport, "myreport", acFormatTXT, "myfile.html", False
It works but I must known the value for the encoding of unicode to write a command like this:
DoCmd.OutputTo acOutputReport, "mioreport", acFormatTXT, "miofile.html", False, , ???????

I try to find the constant for encoding (I try with Unicode, acUnicode, acEncodingUnicode) nothing happends.

Please help me!!!