多字节和宽字节互相转换

 1 char* wchar2char(const wchar_t* _wsrc, char* _dest, size_t _destLen)
 2 {
 3     int  iTextLen = WideCharToMultiByte(CP_ACP,
 4         0,
 5         _wsrc,
 6         -1,
 7         NULL,
 8         0,
 9         NULL,
10         NULL);
11
12     int maxLen = (size_t)iTextLen > _destLen ? _destLen : iTextLen;
13
14     ::WideCharToMultiByte(CP_ACP,
15         0,
16         _wsrc,
17         -1,
18         _dest,
19         maxLen,
20         NULL,
21         NULL);
22
23     return _dest;
24 }
25
26 wchar_t* char2wchar(const char* _src, wchar_t* _dest, size_t _destLen)
27 {
28     int unicodeLen = ::MultiByteToWideChar(CP_ACP,
29         0,
30         _src,
31         -1,
32         NULL,
33         NULL);
34
35     int maxLen = (size_t)unicodeLen > _destLen ? _destLen : unicodeLen;
36
37     ::MultiByteToWideChar(CP_ACP,
38         0,
39         _src,
40         -1,
41         (LPWSTR)_dest,
42         maxLen);
43
44     return _dest;
45
46 }