学步园

直接贴源码：

具体源码函数文件见此链接：http://download.csdn.net/detail/lingxiu0613/5290721

BOOL AnsiToUcs(const CStringA &strAnsi, CStringW &strUcs)
	{
		// Ansi 转换为 Ucs
		int iRet = ::MultiByteToWideChar(CP_ACP, 0, strAnsi, -1, NULL, 0);
		if (iRet == 0)
			return FALSE;
		WCHAR *szBuff = new WCHAR[iRet];
		iRet = ::MultiByteToWideChar(CP_ACP, 0, strAnsi, -1, szBuff, iRet);
		if (iRet == 0)
			return FALSE;
		strUcs = szBuff;
		delete [] szBuff;
		return TRUE;
	}

	BOOL UcsToAnsi(const CStringW &strUcs, CStringA &strAnsi)
	{
		// Ucs 转换为 Ansi
		int iRet = ::WideCharToMultiByte(CP_ACP, 0, strUcs, -1, NULL, 0, NULL, NULL);
		if (iRet == 0)
			return FALSE;
		CHAR *szBuff = new CHAR[iRet];
		iRet = ::WideCharToMultiByte(CP_ACP, 0, strUcs, -1, szBuff, iRet, NULL, NULL);
		if (iRet == 0)
			return FALSE;
		strAnsi = szBuff;
		delete [] szBuff;
		return TRUE;
	}

	BOOL UcsToUtf8(const CStringW &strUcs, CStringA &strUtf8)
	{
		// Ucs 转换为 Utf8
		int iRet = ::WideCharToMultiByte(CP_UTF8, 0, strUcs, -1, NULL, 0, NULL, NULL);
		if (iRet == 0)
			return FALSE;
		CHAR *szBuf = new CHAR[iRet];
		iRet = ::WideCharToMultiByte(CP_UTF8, 0, strUcs, -1, szBuf, iRet, NULL, NULL);
		if (iRet == 0)
			return FALSE;
		strUtf8 = szBuf;
		delete [] szBuf;
		return TRUE;
	}

	BOOL Utf8ToUcs(const CStringA &strUtf8, CStringW &strUcs)
	{
		// Utf8 转换为 Ucs
		// Utf8 转换为 Unicode
		int iRet = ::MultiByteToWideChar(CP_UTF8, 0, strUtf8, -1, NULL, 0);
		if (iRet == 0)
			return FALSE;
		WCHAR *szBuf = new WCHAR[iRet];
		iRet = ::MultiByteToWideChar(CP_UTF8, 0, strUtf8, -1, szBuf, iRet);
		if (iRet == 0)
			return FALSE;
		strUcs = szBuf;
		delete [] szBuf;
		return TRUE;
	}

	BOOL AnsiToUtf8(const CStringA &strAnsi, CStringA &strUtf8)
	{
		// Ansi 转换为 Ucs
		CStringW strUcs;
		BOOL bRet = AnsiToUcs(strAnsi, strUcs);
		if (bRet == FALSE)
			return FALSE;

		// Ucs 转换为 Utf8
		return UcsToUtf8(strUcs, strUtf8);
	}

	BOOL Utf8ToAnsi(const CStringA &strUtf8, CStringA &strAnsi)
	{
		// Utf8 转换为 Ucs
		CStringW strUcs;
		BOOL bRet = Utf8ToUcs(strUtf8, strUcs);
		if (bRet == FALSE)
			return FALSE;

		// Ucs 转换为 Ansi
		bRet = UcsToAnsi(strUcs, strAnsi);
		if (bRet == FALSE)
			return FALSE;

		return TRUE;
	}