void CFileExView::OnFilesave() 
{
    int buffer[100];
    for ( int i=0 ; i<100 ; i++ )
        buffer[i] = i+1;

    CFile file;
    file.Open(_T("FILE.DAT"), CFile::modeCreate | CFile::modeWrite);
    file.Write(buffer, 100 * sizeof(int));
    file.Close(); 
}

void CFileExView::OnFileload() 
{
    int buffer[100];
    CString str, tmp;

    CFile file;
    file.Open(_T("FILE.DAT"), CFile::modeRead);
    file.Read(buffer, 100 * sizeof(int));
    file.Close();

    for ( int i=0 ; i<100 ; i++ )
    {
        tmp.Format("%d", buffer[i]);
        str += tmp + " ";
    }

    AfxMessageBox(str); 
}