NAME
    WBenchToBack -- Send the Workbench screen in back of all screens.
SYNOPSIS
    Success = WBenchToBack()
    D0
    BOOL WBenchToBack( VOID );
FUNCTION
    Causes the Workbench screen, if it's currently opened, to go behind
    all other screens.  This does not 'move' the screen up or down,
    instead only affects the depth-arrangement of the screens.
INPUTS
    None
RESULT
    If the Workbench screen was opened, this function returns TRUE,
    otherwise it returns FALSE.
BUGS
SEE ALSO
    wbenchtofront(), screentofront()