I got it.
Documented but not easy to found:
objfax.SetClientId(uniquestringassys2015)



>Carlos,
>
>Did you try to close WinFax session before printing report?

objfax = Null
>report form envios to printer noconsole
>

>
>>Thanks for answering Sergey.
>>Winfax sends the attached file but not the report sent to the printer.
>>No idea of the way to go.
>>
>>>Carlos,
>>>
>>>What kind of problem do you have?
>>>
>>>>I have problems sending a fax with one file attached and then printing a report. The code i'm using is like this: