unicode编码乱码如何解决啊

unicode编码乱码怎么解决啊？
我的设备装了WINCE，有一个串口跟电脑连接，电脑发送数据给WINCE，接收到的是乱码，不知道怎么解决？

[解决办法]
多字节和宽字符之间转换的函数：mbstowcs, mbtowc, wcstombs, wctomb.
mbstowcs---Convert a multi-byte(ANSI) string to wide character stirng(Unicode).
wcstombs---Convert a wide character string to multi-byte string.
WCHAR szwcBuffer[100];
char szBuffer[100];
char* lpszConvert = "ANSI String to convert ";
WCHAR* lpszwcConvert = _T( "Unicode string to convert ");
int nChars;
nChars = mbstowcs(szwcBuffer, lpszConvert, 100);
nChars = wcstombs(szBuffer, lpszwcConvert, 100);
//MultiByteToWideChar, WideCharToMultByte.//用在code page(编码页)

相关函数(ANSI Function, Unicode Function;)：strcpy, wcscpy; strcat, wcscat; strcmp, wcscmp;
strlen, wcslen; strchr, wcschr; strstr, wcsstr; _strrev, _wcsrev;

//Convert an ANSI character to Unicode.
//set the high byte in the Unicode character to zero and copy the ANSI character into the low byte
WCHAR wC;
char c = 'C ';
wC = MAKEWORD(c, 0);