1     //ANSI窄字节
 2     CHAR cData1 = ‘a‘;//char
 3     PCHAR pcData2 = "abc";//char*
 4     PSTR pstrData3 = "def";//char*
 5     LPSTR lpData4 = "ghi";//char*
 6     LPCSTR lpcData5 = "okz"; //const char*
 7     printf("ANSI: %d \n", (strlen(lpcData5) + 1) * sizeof (CHAR));//4
 8 
 9     //Unicode宽字节
10     WCHAR cData6 = ‘a‘; //wchar_t
11     PWCHAR pcData7 = L"abc";//wchar_t*
12     PWSTR pstrData8 = L"def";//wchar_t*
13     LPWSTR lpData9 = L"ghi";//wchar_t*
14     LPCWSTR lpcData10 = L"okz";//const wchar_t*
15     printf("Unicode: %d \n", (wcslen(lpcData10) + 1) * sizeof (WCHAR));//8
16 
17     //通用字节：根据项目-->字符集：多字节/Unicode自动切换
18     TCHAR cData11 = ‘a‘;// char or wchar_t
19     //PTCHAR pcData12 = _T("abc");// char* or wchar_t* _TCHAR_DEFINED未定义时可使用
20     PTSTR pstData13 = _T("def");// char* or wchar_t*
21     LPTSTR lpData14 = _T("ghi");// char* or wchar_t*
22     LPCTSTR lpcData15 = _T("okz");//const char* or const wchar_t*
23     printf("ANSI OR Unicode: %d \n", (_tcslen(lpcData15) + 1) * sizeof (TCHAR));//字符集为Unicode:8

 1 //代码页-----CP_ACP：C++代码用的  UTF-8：网页用的
 2 /*=====================wchar_t*===>char*============================*/
 3 char* w2a(wchar_t* lpszSrc, UINT   CodePage = CP_ACP)
 4 {
 5     if (lpszSrc != nullptr)
 6     {
 7         int  nANSILen = WideCharToMultiByte(CodePage, 0, lpszSrc, -1, nullptr, 0, nullptr, nullptr);
 8         char* pANSI = new char[nANSILen + 1];
 9         if (pANSI != nullptr)
10         {
11             ZeroMemory(pANSI, nANSILen + 1);
12             WideCharToMultiByte(CodePage, 0, lpszSrc, -1, pANSI, nANSILen, nullptr, nullptr);
13             return pANSI;
14         }
15     }
16     return nullptr;
17 }
18 /*=====================char*===>wchar_t*============================*/
19 wchar_t* a2w(char* lpszSrc, UINT   CodePage = CP_ACP)
20 {
21     if (lpszSrc != nullptr)
22     {
23         int nUnicodeLen = MultiByteToWideChar(CodePage, 0, lpszSrc, -1, nullptr, 0);
24         LPWSTR pUnicode = new WCHAR[nUnicodeLen + 1];
25         if (pUnicode != nullptr)
26         {
27             ZeroMemory((void*)pUnicode, (nUnicodeLen + 1) * sizeof(WCHAR));
28             MultiByteToWideChar(CodePage, 0, lpszSrc, -1, pUnicode, nUnicodeLen);
29             return pUnicode;
30         }
31     }
32     return nullptr;
33 }
34 
35 
36 ... ...
37 
38     char* pcTemp1 = w2a(pcData7);//Unicode-->ANSI
39     printf("Unicode to ANSI: %d \n", (strlen(pcTemp1) + 1) * sizeof (CHAR));//4
40     wchar_t* pwcTemp2 = a2w(pcData2);//ANSI-->Unicode
41     printf("ANSI to Unicode: %d \n", (wcslen(pwcTemp2) + 1) * sizeof (WCHAR));//8
42 
43     if (nullptr != pcTemp1) delete pcTemp1;
44     if (nullptr != pwcTemp2) delete pwcTemp2;

1     ATL::CW2A objW2A(pcData7);//Unicode-->ANSI
2     char* pcTemp3 = (char*)objW2A;
3     printf("ATL Unicode to ANSI: %d \n", (strlen(pcTemp3) + 1) * sizeof (CHAR));//4
4 
5     ATL::CA2W objA2W(pcData2);//ANSI-->Unicode
6     wchar_t* pcTemp4 = (wchar_t*)objA2W;
7     printf("ATL ANSI to Unicode: %d \n", (wcslen(pcTemp4) + 1) * sizeof (WCHAR));//8

1     //CString-->TCHAR* 
2     CString strData1 = _T("abcdef");
3     TCHAR* pcTemp5 = strData1.GetBuffer();
4     //TCHAR*-->CString
5     TCHAR* pcData12 = _T("defgki");
6     CString strTemp6(pcData12);

 1 #if _UNICODE
 2     //std::wstring-->wchar_t*
 3     std::wstring strData3 = _T("defgki");
 4     const wchar_t* pcTemp8 = strData3.c_str();
 5     //wchar_t*-->std::wstring
 6     const wchar_t* pcData14 = L"defgki";
 7     std::wstring strData5(pcData14);
 8 #else
 9     //std::string-->char*
10     std::string strData2 = "abcdef";
11     const char* pcTemp7 = strData2.c_str();
12     //char*-->std::string
13     const char* pcData13 = "abcdef";
14     std::string strData4(pcData13);
15 #endif 

 1 #if _UNICODE
 2     //CString-->std::wstring
 3     CString strData6 = _T("abcdef");
 4     std::wstring strTemp9 = strData6.GetBuffer();
 5     //std::wstring-->CString
 6     std::wstring strData7 = L"abcdef";
 7     CString strTemp10 = strData7.c_str();
 8 #else
 9     //CString-->std::string
10     CString strData8 = _T("abcdef");
11     std::string strTemp11 = strData8.GetBuffer();
12     //std::string-->CString
13     std::string strData9 = L"abcdef";
14     CString strTemp12 = strData9.c_str();
15 #endif