字符串处理 - ANSI - Unicode - UTF8 转换

C语言风格，不担心内存泄露 wchar_t *ANSIToUnicode(const char *str, wchar_t *wstr){int Len = ::MultiByteToWideChar(CP_ACP,0,str,-1,NULL,0);wchar_t * pUnicode;pUnicode = new wchar_t[Len + 1];memset(pUnicode, 0, (Len + 1)*sizeof(wchar_t));::MultiByteToWideChar(CP_ACP, 0, str, -1, pUnicode, Len);wcscpy(wstr, pUnicode);delete pUnicode;return wstr;}char *UnicodeToAnsi(const wchar_t *wstr, char *str){int Len = ::WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);char * pChar;pChar = (char *)malloc((Len + 1)*sizeof(char));memset(pChar, 0, (Len + 1)*sizeof(char));::WideCharToMultiByte(CP_ACP, 0, wstr, -1, pChar, Len, NULL, NULL);strcpy(str, pChar);delete pChar;return str;}