In addition to its frame controls, a frame window also can contain a sizing border and the minimize and maximize buttons (also known as minimize and maximize icons). These items are not frame controls, because the frame window draws and maintains them. (Frame controls are windows that draw and maintain themselves.)

The sizing border encloses the frame window and lets the user change the size of the window using a mouse. The minimize button, at the right end of the title bar, lets the user reduce the frame window to an icon. The maximize button, to the right of the minimize button, lets the user enlarge the window so that it fills the screen. An application can add these items to a frame window by using the FCF_SIZEBORDER, FCF_MAXBUTTON, and FCF_MINBUTTON (or FCF_MINMAX) styles. (The FCF_MINMAX style adds both a maximize button and a minimize button.)