# add\_struc\_member

Add structure member.

```
This function can be used in two forms.
First form:
long add_struc_member(long id, string name, long offset, long flag,
                    long typeid, long nbytes);
Second form:
long add_struc_member(long id, string name, long offset, long flag,
                    long typeid, long nbytes,
                    long target, long tdelta, long reftype);

arguments:
  id      - structure type ID
  name    - name of the new member
  offset  - offset of the new member
            -1 means to add at the end of the structure
  flag    - type of the new member. Should be one of
            FF_BYTE..FF_PACKREAL (see above)
            combined with FF_DATA
  typeid  - if is_struct(flag) then typeid specifies
            the structure id for the member
            if is_off0(flag) then typeid specifies
            the offset base.
            if is_strlit(flag) then typeid specifies
            the string type (STRTYPE_...).
            if is_stroff(flag) then typeid specifies
            the structure id
            if is_enum(flag) then typeid specifies
            the enum id
            Otherwise typeid should be -1
  nbytes  - number of bytes in the new member
the remaining arguments are allowed only if isOff0(flag) and you want
to specify a complex offset expression
  target  - target address of the offset expr. You may specify it as
            -1, ida will calculate it itself
  tdelta  - offset target delta. usually 0
  reftype - see REF_... definitions
returns: 0-ok, otherwise error code TERR_...

long add_struc_member(long id, string name, long offset, long flag, long typeid, long nbytes,
                      long target, long tdelta, long reftype);

// Constants used with begin_type_updating() and end_type_updating()
#define UTP_ENUM      0
#define UTP_STRUCT    1
```

See more: [STRTYPE\_...](/9.0/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/283.md)


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