CString and char *

1、多字符集设置下：
CString To char*:
1)、
CString str; 
char *buf = str.GetBuffer();
2)、
CString str;
char *buf = (LPSTR)(LPCSTR)str;

char* To CString
1)、
char *buf;
CString str(buf);

2、Unicode字符集下：
CString To char*:
1)、
CString st =_T("123");  
int len =WideCharToMultiByte(CP_ACP,0,str,-1,NULL,0,NULL,NULL);  
char *buf =new char[len +1];  
WideCharToMultiByte(CP_ACP,0,str,-1,buf,len,NULL,NULL );  
  
//...  
delete[] buf;

char* To CString
1)、
char *buf;
CString str(buf); 

3、方法：
static std::string Unicode2ANSI(LPCWSTR lpszSrc)
{
std::string sResult;
if (lpszSrc != NULL)
{
int  nANSILen = WideCharToMultiByte(CP_ACP, 0, lpszSrc, -1, NULL, 0, NULL, NULL);
char* pANSI = new char[nANSILen + 1];
if (pANSI != NULL)
{
ZeroMemory(pANSI, nANSILen + 1);
WideCharToMultiByte(CP_ACP, 0, lpszSrc, -1, pANSI, nANSILen, NULL, NULL);
sResult = pANSI;
delete[] pANSI;
}
} 
return sResult;
}

static std::wstring ANSI2Unicode(LPCSTR lpszSrc)
{
std::wstring sResult;
if (lpszSrc != NULL)
{
int nUnicodeLen = MultiByteToWideChar(CP_ACP, 0, lpszSrc, -1, NULL, 0);
LPWSTR pUnicode = new WCHAR[nUnicodeLen + 1];
if (pUnicode != NULL)
{
ZeroMemory((void*)pUnicode, (nUnicodeLen + 1) * sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0, lpszSrc,-1, pUnicode, nUnicodeLen);
sResult = pUnicode;
delete[] pUnicode;
}
}
return sResult;
}
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