getprinter level 0: was to short, found most of the fields, undocumented,

getprinter level 0: was to short, found most of the fields, undocumented,
undecoded, nothing in MSDN, but now it works :-)

cleanup of error codes.
fixed some dfs declarations function.

	J.F.
(This used to be commit 87da4404aba29a2ebd999886e4c06958c96d3e05)