Creating PRIVATE custom field in the calendar

[useractive]

Hello everyone,

I really would appreciate if some could briefly guide me how to modify vbulletin to be able to add a CUSTOM FIELD which could viewable only by the owner.

Has anybody done any mods in this direction?

Appreciate your help in advance.

--------------- Added [DATE]1213310067[/DATE] at [TIME]1213310067[/TIME] ---------------

I have figured out that I could "copy" and use code from the admincp/profilefield.php, since it is possible to add PRIVATE custom profile field.

I have found this code line:
print_yes_no_row($vbphrase['field_hidden_on_profile'], 'profilefield[hidden]', $profilefield['hidden']);

However, I do not understand how it works?

Could someone please help me understand this line?