Convert ANSI to Unicode to ANSI

Convert ANSI to Unicode
(1) Use the macro L, for example, clsidfromprogid (L "mapi. folder", & CLSID );
(2) Implement conversion through the multibytetowidechar function, for example:
Char * szprogid = "mapi. folder ";
Wchar szwideprogid [128];
CLSID;
Long llen = multibytetowidechar (cp_acp, 0, szprogid, strlen (szprogid), szwideprogid, sizeof (szwideprogid ));
Szwideprogid [llen] = '/0 ';
(3) using the a2w macro, for example:
Uses_conversion;
Clsidfromprogid (a2w (szprogid), & CLSID );

Convert Unicode to ANSI
(1) Use widechartomultibyte, for example:
// Assume that you already have a unicode string wszsomestring...
Char szansistring [max_path];
Widechartomultibyte (cp_acp, wc_compositecheck, wszsomestring,-1, szansistring, sizeof (szansistring), null, null );
(2) Use the w2a macro, for example:
Uses_conversion;
Ptemp = w2a (wszsomestring );