make a user account as control source for a field in a form

[Bax]

I want my form to update a field in the control source table with the user
account name.

 

[June7 via AccessMonster.com]

Is the user account name the key field? Or is there an account number that
serves as the key field to link records? If the latter, why duplicate saving
the name? If the first is case then aren't users selecting the name from a
list in combo or list box? If this control is bound to the table then the
selected value is saved directly to the table.