MFC中Hex转GBK的方法

我可以回答这个问题。在MFC中，可以使用MultiByteToWideChar函数将Hex转换成Unicode，然后再使用WideCharToMultiByte函数将Unicode转换成GBK编码。具体实现可以参考以下代码：

CString HexToGBK(const CString& strHex)
{
    CString strGBK;

    int nLength = strHex.GetLength() / 2;
    BYTE* pByte = new BYTE[nLength];
    for (int i = 0; i < nLength; i++)
    {
        CString strByte = strHex.Mid(i * 2, 2);
        pByte[i] = (BYTE)strtol(strByte, NULL, 16);
    }

    WCHAR* pUnicode = new WCHAR[nLength + 1];
    memset(pUnicode, 0, (nLength + 1) * sizeof(WCHAR));
    MultiByteToWideChar(CP_ACP, 0, (LPCSTR)pByte, nLength, pUnicode, nLength + 1);

    int nGBKLength = WideCharToMultiByte(CP_UTF8, 0, pUnicode, nLength, NULL, 0, NULL, NULL);
    char* pGBK = new char[nGBKLength + 1];
    memset(pGBK, 0, nGBKLength + 1);
    WideCharToMultiByte(CP_UTF8, 0, pUnicode, nLength, pGBK, nGBKLength, NULL, NULL);

    strGBK = CString(pGBK);

    delete[] pByte;
    delete[] pUnicode;
    delete[] pGBK;

    return strGBK;
}