请教程序：为什么该程序在VS2005中运行总出现错误？（错误提示粘贴到程序最后）

nt _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
    int nRetCode = 0;

    // initialize MFC and print and error on failure
    if (!AfxWinInit(::GetModuleHandle(NULL), NULL, ::GetCommandLine(), 0))
    {
        // TODO: change error code to suit your needs
        _tprintf(_T("Fatal Error: MFC initialization failed\n"));
        nRetCode = 1;
    }
    else
    {
        // TODO: code your application's behavior here.
        CFile file("\\VC教程\\MyFile.txt",CFile::modeReadWrite);
        ULONGLONG m_nLen=file.GetLength();
        char str[80];
        file.Read(&str,m_nLen);
        for(int i=0;i<m_nLen;i++)
            cout<<str[i];
        cout<<endl;
        file.Close();
    }

    return nRetCode;
}
为什么改程序在VS2005中运行总提示如下错误，请各位高手指教。
1>e:\myfile\myfile\myfile.cpp(34) : error C2664: 'CFile::CFile(LPCTSTR,UINT)' : cannot convert parameter 1 from 'const char [19]' to 'LPCTSTR'