; File access modes
        open_access_readonly     = 00h
        open_access_writeonly    = 01h
        open_access_readwrite    = 02h
        open_share_compatibility = 00h
        open_share_denyreadwrite = 10h
        open_share_denywrite     = 20h
        open_share_denyread      = 30h
        open_share_denynone      = 40h
        open_flags_noinherit     = 80h
        open_flags_nocrit_err  = 2000h  ; Extended Open/Create only
        open_flags_commit      = 4000h  ; Extended Open/Create only