預設用notepad開啟檔案

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\.]

[HKEY_CLASSES_ROOT\.\shell]

[HKEY_CLASSES_ROOT\.\shell\open]

[HKEY_CLASSES_ROOT\.\shell\open\command]
@="Notepad.exe %1"

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\*\shell\Open with Notepad]

[HKEY_CLASSES_ROOT\*\shell\Open with Notepad\command]

@="notepad.exe %1"

from: http://www.winhelponline.com/articles/67/1/How-to-associate-Notepad-to-open-files-with-no-extension.html

http://www.howtogeek.com/howto/windows-vista/add-open-with-notepad-to-the-context-menu-for-all-files/