Convert the current item to a custom data type ea - linear address size - size of the item dtid - custom data type id (see ) fid - custom data format id (see ) returns: 1-ok, 0-failure This is a convenience macro, see also () function
#define create_custom_data(ea, size, dtid, fid) create_data(ea, FF_CUSTOM, size, dtid|((fid)<<16))