Display record in Text box that is from expression NOT data Source

is there way to display information in Text Box but not bind to data source. I want to get Case information i.e. who has created case! you can get it by

CaseInitiatorUserID = Me.Case.Creator.Id;

CaseInitiatorUserID;

so I should be able to show this record in object to Text Box... Standard programming... why it force me to add data source also even If I have to, cannot add WFCase table in model. I believe I am in catch 22 unless I missing here something