Using the GUI means it communicates the changes to the system immediately,
using API call. REG files don't do that. That's the reason you need a
program to accomplish the task, using SystemParametersInfo API.

--
Regards,

Ramesh Srinivasan, Microsoft MVP [Windows XP Shell/User]
Windows® XP Troubleshooting http://www.winhelponline.com


<dingdongdingding@yahoo.com> wrote in message
news:1136449938.752050.90720@g49g2000cwa.googlegro ups.com...
I don't understand... if I use the GUI to change the timeout, it works
without a reboot. WHy this case, I need to reboot ?


Ramesh, MS-MVP wrote:
> FYI: After the registry modification, the system needs a reboot for the
> change to be applied.