TextBox.EnterKeyBehavior Property (Access)
You can use the EnterKeyBehavior property to specify what happens when you press ENTER in a text box control in Form view or Datasheet view. Read/write Boolean.
For example, you can use this property if you have a control bound to a Memo field in a table to make entering multiple-line text easier. If you don't set this property to New Line In Field, you must press CTRL+ENTER to enter a new line in the text box.
You can also set the default for this property by setting a control's DefaultControl property in Visual Basic.