Using CFile with binary files

I'm trying to learn to use  the MFC CFile object to open binary files and I get the following error message on linking:
 Compiling...
 temp.cpp
 Linking...
 nafxcw.lib(afxmem.obj) : error LNK2005: "void __cdecl operator
 delete(void *)" (??3@YAXPAX@Z) already defined in libcp.lib(delop.obj)

 nafxcw.lib(thrdcore.obj) : error LNK2001: unresolved external symbol
 __endthreadex
 nafxcw.lib(thrdcore.obj) : error LNK2001: unresolved external symbol
 __beginthreadex
 Release/temp.exe : fatal error LNK1120: 2 unresolved externals
 Error executing link.exe.

I am at a complete loss as to how to fix it.

Here is the source code :

#include <iostream>
using namespace std;
#include <stdio.h>
#include <afx.h> // for CString, CFile

class DataFileHeader
{
public:
    int     m_nNoChannels;
    double  m_dUpdateRate;
    double  m_dMinPower;
    double  m_dMaxPower;
    int     m_nNoDataPts;
    int     m_nTempLoopedFlag;
};

int main()
{

DataFileHeader inputbuffer;

CString writebuffer;
char tempbuffer[50];
CString outputbuffer;
CString sInFilename = "red-11.dat"; // the binary input file
CString sOutFilename = "Output.txt";

CFile testin(sInFilename,CFile::modeRead|CFile::typeBinary);
CFile testout(sOutFilename,CFile::modeWrite|CFile::typeText);

UINT nBytesRead = testin.Read(&inputbuffer,sizeof( DataFileHeader ));

cout << "Number of Bytes Read " << nBytesRead << endl;

sprintf(tempbuffer, "Number of Channels -
%d\n",inputbuffer.m_nNoChannels);
outputbuffer = tempbuffer;

.... and so on ...

sprintf(tempbuffer,"Temperature Looped Flag -
%d\n",inputbuffer.m_nTempLoopedFlag);
outputbuffer += tempbuffer;

writebuffer = outputbuffer;

cout << (LPCTSTR)writebuffer;

testout.Write((LPCTSTR)writebuffer,sizeof(outputbuffer)/sizeof(outputbuffer[0]));

testout.Close();
testin.Close();

return 0;
}

There doesn't appear to be anything syntactically wrong with the code, but I don't know what to do about the Linker error.

Any help would be greatly appreciated.

Sincerely, Martin MacRobert