Form.ControlBox Property (Access)
Specifies whether a form has a Control menu in Form view and Datasheet view. Read/write Boolean.
The default value is True.
Setting the ControlBox property to False also removes the Minimize, Maximize, and Close buttons on a form.
It can only be set in form Design view.
To display a Control menu on a form, the ControlBox property must be set to Yes and the form's BorderStyle property must be set to Thin, Sizable, or Dialog.
Even when a form's ControlBox property is set to No, the form always has a Control menu when opened in Design view.
Setting the ControlBox property to No suppresses the Control menu when you:
Open the form in Form view from the Database window.
Open the form from a macro.
Open the form from Visual Basic.
Open the form in Datasheet view.
Switch to Form or Datasheet view from Design view.