创建的一个console程序，一直报错，高手给看看啊！

#include "afx.h"
#include "iostream.h"
#include "afxwin.h"

void main()
{
    CStdioFile file;
    if (file.Open("h:\\book\my project\CFileOpen\a.txt",CFile::modeRead))
    {
        CString str;
        for (;file.ReadString(str);)
        {
            AfxMessageBox(str);
        }
    }
}


错误提示：
Linking...
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __endthreadex
nafxcwd.lib(thrdcore.obj) : error LNK2001: unresolved external symbol __beginthreadex
Debug/newone.exe : fatal error LNK1120: 2 unresolved externals
Error executing link.exe.

newone.exe - 3 error(s), 0 warning(s)
谢谢大家了！