what's wrong with this

Dear All,
I have a program like:

Code:

---

void CProjDlg::OnCalculte()
{
       
        typedef UINT (CALLBACK* LPFNDLLFUNC1)(INT,INT);
        typedef UINT (CALLBACK* LPFNDLLFUNC2)(INT);
        HINSTANCE hDLL; // Handle to DLL
        LPFNDLLFUNC1 Output; // Function pointer
        LPFNDLLFUNC2 Input; // Function pointer
        INT Addr;
        INT AddrIn;
        INT Value;
        hDLL = LoadLibrary("Inpout32");
        if (hDLL != NULL)
        {
          Output = (LPFNDLLFUNC1)GetProcAddress(hDLL,"Out32");
          Input = (LPFNDLLFUNC2)GetProcAddress(hDLL,"Inp32");
          if (!Output || !Input)
          {
            // handle the error FreeLibrary(hDLL);
          }
        }
        Addr = 0x378;
        AddrIn = 0x379;
        Value = 0;
        Output(Addr, Value);
        int somenum = Input(Addr);
        m_value=somenum;
        UpdateData(0);

}

---

but it cannot get the data from parallel port running in windows NT, what is the wrong? Thank u.

http://cboard.cprogramming.com/showt...threadid=47515

gg