An application can include a scroll bar in a standard frame window by specifying the FCF_HORZSCROLL or FCF_VERTSCROLL flag in the WinCreateStdWindow function. To create a scroll bar in another type of window, an application can specify the predefined (preregistered) window class WC_SCROLLBAR in the WinCreateWindow function or in the CONTROL statement in a resource file.
Although most applications specify an owner window when creating a scroll bar, an owner is not required. If an application does not specify an owner, the scroll bar does not send notification messages.