How to triger Form F3(Insert Function) in codeuni?

How to triger Form F3(Insert Function) in codeuni? my customer don’t want press F3 after he key in some data in form, he want to auto general next blank form after he finish fill this form. hwo can ??

who know how to write a unitcode like Function F3(insert a new blank record & can key in new data in this form) ?

any sugguest?