next_folio name

as my frans is bad, i have problems searching the forum.
i want a folio report to have the pagenumber instead of the ordernumber.
example i use 
page 10 with power,
page 11 for power etc...
page 100 to start with PLC,
in between is nothing, i can make empty pages, however there will be a lot.
is it possible to have the code changed instead of %f,%l,%c in a variable i choose myself and also on that page like pagenumber.
i changed folio-id on the template into %{code} and it works fine
however in the report-folio i can not change this as this variable is not available.
greetings paul,