ControlMenu property
Available for window objects (Window, MDIWindow and DialogBox).
Read/Write only at design time
Specifies whether a window has a control menu box in its title bar. It can be one of the following values:
TRUE Window has a control menu
(default).
FALSE Window does not have a control
menu.
REMARKS: This property has no effect if the window does not have
a caption (title bar). See the Caption property.