Specifies whether a Control-menu box appears on a form at run time; read-only at run time.
The ControlBox property settings are:
True (Default) Displays the Control-menu box.
False Removes the Control-menu box.
To display a Control-menu box, you must also set the form's BorderStyle property to 1 (Fixed Single), 2 (Sizable), or 3 (Fixed Double).
Both modal The commands available at run time depend on the settings for related propertiesfor example, setting MaxButton and MinButton to False disables the Maximize and Minimize commands on the Control menu, but the Move and Close commands remain available. and modeless windows can include a Control-menu box.
In Microsoft Windows version 3.0, an MDI child form However, if ControlBox is False, the menu appears without Close or Next commands. appears with a Control-menu box regardless of the ControlBox setting.
Note Settings you specify for ControlBox, BorderStyle, MaxButton, and MinButton are not reflected in the form's appearance until run time.
Chapter 4, "Menus and Dialogs"