These are created in the usual way. Child windows are created when pID
refers to an already existing window (NB: This is not the same as
specifying WS_CHILD in the style). All the standard &
extended class styles are available to the user but Common Dialog
windows will have Windows-defined parameters. By specifying
WS_HSCROLL and/or WS_VSCROLL in the style parameter the window
will be created with builtin scroll bar/s. In this situation the
window's handler routine will then be sent any scroll messages
relating to those scroll bars. ARWEN has provision for managing
an independent set of scroll bars to replace the poorly
performing built-in scroll bars.