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NAME
    ModeNotAvailable -- check to see if a DisplayID isn't available. (V36)

SYNOPSIS
    error =  ModeNotAvailable( modeID )
    d0                         d0

    ULONG   ModeNotAvailable( ULONG);

FUNCTION
    returns an error code, indicating why this modeID is not available,
    or NULL if there is no reason known why this mode should not be there.

INPUTS
    modeID -- a 32 bit DisplayInfoRecord identifier.

RESULT
    error -- a general indication of why this modeID is not available,
             or NULL if there is no reason why it shouldn't be available.

NOTE
    ULONG return values from this function are a proper superset of the
    DisplayInfo.NotAvailable field (defined in graphics/displayinfo.h).

BUGS

SEE ALSO
    graphics/displayinfo.h, getvpmodeid()