身部才是執行動作所必要者
Win32Forth 詞之基本構造如下:
\ BFA: MSB 8 128 IMMEDIATE flag
\ 7 64 DEPRECATED flag
\ 6 32 unused
\ 5 16 unused
\ 4 8 unused
\ 3 4 OFA set if OFA is present
\ 2 2 FFA set if FFA is present
\ LSB 1 1 VFA set if VFA is present
128 constant BFA_IMMEDIATE \ bit of header's field BFA : true if word is immediate
64 constant BFA_DEPRECATED \ bit of header's field BFA : true if word is deprecated
32 constant BFA_UNUSED3
16 constant BFA_UNUSED2
8 constant BFA_UNUSED1
4 constant BFA_OFA_PRESENT \ bit of header's field BFA : true if optimize field present
2 constant BFA_FFA_PRESENT \ bit of header's field BFA : true if file field present
1 constant BFA_VFA_PRESENT \ bit of header's field BFA : true if view field present