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.

how to control pinter port read/write using C++

gg