File list (Check if you may need any files):
XSudoku.dsw
bin
...\example1.txt
...\XSudokuDlgR.exe
...\XSudokuSDIR.exe
...\XSudokuWndR.dll
Dialog App
..........\About.cpp
..........\About.h
..........\app.manifest
..........\FontSize.cpp
..........\FontSize.h
..........\hans.ico
..........\HyperLink.cpp
..........\HyperLink.h
..........\resource.h
..........\StdAfx.cpp
..........\StdAfx.h
..........\XFileDialog.cpp
..........\XFileDialog.h
..........\XFileDialog.rc
..........\XFileDialogRes.h
..........\XHistoryCombo.cpp
..........\XHistoryCombo.h
..........\XSudoku.cpp
..........\XSudoku.h
..........\XSudokuDlg.cpp
..........\XSudokuDlg.dsp
..........\XSudokuDlg.h
..........\XSudokuDlg.rc
..........\XTrace.h
SDI App
.......\About.cpp
.......\About.h
.......\app.manifest
.......\FontSize.cpp
.......\FontSize.h
.......\GDIUtil.cpp
.......\GDIUtil.h
.......\hans.ico
.......\HyperLink.cpp
.......\HyperLink.h
.......\MainFrm.cpp
.......\MainFrm.h
.......\Resource.h
.......\StdAfx.cpp
.......\StdAfx.h
.......\Toolbar.bmp
.......\XSudokuSDI.cpp
.......\XSudokuSDI.dsp
.......\XSudokuSDI.h
.......\XSudokuSDI.rc
.......\XSudokuSDIDoc.cpp
.......\XSudokuSDIDoc.h
.......\XSudokuSDIDoc.ico
.......\XSudokuSDIView.cpp
.......\XSudokuSDIView.h
XSudokuWndDll
.............\About.cpp
.............\About.h
.............\Clipboard.cpp
.............\Clipboard.h
.............\ColorPrefDlg.cpp
.............\ColorPrefDlg.h
.............\dance.cpp
.............\dance.h
.............\DllInstanceSwitcher.h
.............\FontSize.cpp
.............\FontSize.h
.............\GDIUtil.cpp
.............\GDIUtil.h
.............\hans.ico
.............\MemDC.h
.............\resource.h
.............\StdAfx.cpp
.............\StdAfx.h
.............\SudokuEntryDlg.cpp
.............\SudokuEntryDlg.h
.............\XColourPicker.cpp
.............\XColourPicker.h
.............\XColourPopup.cpp
.............\XColourPopup.h
.............\XHyperLink.cpp
.............\XHyperLink.h
.............\XSudokuWnd.cpp
.............\XSudokuWnd.h
.............\XSudokuWndDll.cpp
.............\XSudokuWndDll.dsp
.............\XSudokuWndDll.rc
.............\XTrace.h