Change printer security

Hi to all. I hope you can help me.
I'm trying to change the security settings of a printer, adding a user with the print privilege.
I found all the functions to call, but can't find the constants for printer security.
What I can't find is the value I have to pass to AddAccessAllowedAce in the third parameter, which is the access mask.
Even I tried retrieving the users that has access and using the permission value I get but all I can do is add the user with Special Access permission, that is not what I'm looking.
Also tried with generic permissions.
Any help would be appreciated.
Thanks in advance.

Gabriel Passadore
Telefonica de Argentina
[email protected]