WTL/ATL CString CStringA 到 char *

CT2A这个宏的正确用法：

其实主要用的是：CW2A ==== 宽字符转单字节

BOOL SetItemStringAttribute(UINT uItemID, LPCSTR lpszAttrib, LPCTSTR lpszValue)

{

return SetItemAttribute(uItemID, lpszAttrib, CT2A(lpszValue, CP_UTF8));

}

tinyxml.h中常有字符串转换 atlconv.h // =========================================================

typedef CW2AEX<> CW2A;

#ifdef _UNICODE

#define CW2T CW2W

#define CW2TEX CW2WEX

#define CW2CT CW2CW

#define CW2CTEX CW2CWEX

#define CT2W CW2W

#define CT2WEX CW2WEX

#define CT2CW CW2CW

#define CT2CWEX CW2CWEX

#define CA2T CA2W

#define CA2TEX CA2WEX

#define CA2CT CA2W

#define CA2CTEX CA2WEX

#define CT2A CW2A

#define CT2AEX CW2AEX

#define CT2CA CW2A

#define CT2CAEX CW2AEX

#else // !_UNICODE

#define CW2T CW2A

#define CW2TEX CW2AEX

#define CW2CT CW2A

#define CW2CTEX CW2AEX

#define CT2W CA2W

#define CT2WEX CA2WEX

#define CT2CW CA2W

#define CT2CWEX CA2WEX

#define CA2T CA2A

#define CA2TEX CA2AEX

#define CA2CT CA2CA

#define CA2CTEX CA2CAEX

#define CT2A CA2A

#define CT2AEX CA2AEX

#define CT2CA CA2CA

#define CT2CAEX CA2CAEX

#endif // !_UNICODE