The following ANSI-mandated features are new to version 7.0:
Wide characters (type (wchar_t) have been implemented. See topic for more information.
Complete parameter declarations ( int a ) and abstract declarations ( int ) are allowed in the same declaration.
The STDLIB.H header file contains five new functions (mblen, mbstowcs, mbtowc, wcstombs, and wctomb), and a new macro, MB_CUR_MAX, for wide character support.
Microsoft C version 7.0, also provides model-independent versions of these new functions (_fmblen, _fmbtowc, _fwctomb, _fmbstowcs, and _fwctombs), although these functions are not mandated by ANSI.