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The pages on this site contain documentation for very old MS-DOS software, purely for historical purposes. If you're looking for up-to-date documentation, particularly for programming, you should not rely on the information found here, as it will be woefully out of date.

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─────C/C++ Language─────────────────────────────────────────────────────────
 
  Include:   <stddef.h>
 
  Syntax:    size_t offsetof( struct_name, member_name );
 
             The macro offsetof takes a structure name and a member
             name as arguments. It returns the offset in bytes of the
             specified member from the beginning of the structure.
 
             Types can be specified using the struct keyword.
 
             NOTE: offsetof is not a function and cannot be described
                   using a C prototype.
 
  Returns:   offset of member_name from beginning of structure.
             Undefined for bit fields.
                                    -♦-