char *gyarmyWideCharToAnsi(wchar_t *pWideChar)

{

	if (!pWideChar) return NULL;

	char *pszBuf = NULL;

	int needBytes = WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, NULL, 0, NULL, NULL);

	if (needBytes > 0){

		pszBuf = new char[needBytes + 1];

		ZeroMemory(pszBuf, (needBytes + 1)*sizeof(char));

		WideCharToMultiByte(CP_ACP, 0, pWideChar, -1, pszBuf, needBytes, NULL, NULL);

	}



	return pszBuf;

}



wchar_t *gyarmyAnsiCharToWide(char *pChar)

{

	if (!pChar) return NULL;

	wchar_t *pszBuf = NULL;

	int needWChar = MultiByteToWideChar(CP_ACP, 0, pChar, -1, NULL, 0);

	if (needWChar > 0){

		pszBuf = new wchar_t[needWChar + 1];

		ZeroMemory(pszBuf, (needWChar + 1)*sizeof(wchar_t));

		MultiByteToWideChar(CP_ACP, 0, pChar, -1, pszBuf, needWChar);

	}



	return pszBuf;

}

##更简单的写法

char *p = "abcdef";

 USES_CONVERSION;

 wchar_t *pw = A2W(p);