# Windows

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.