How can I forbid user to change clock setting of his pocket pc?

[heyao]

My progject based on pocket pc and vb.net have to resolve some security
problem, Now ,I have met two difficutites as follow:
1:because employees are requireded to finish their work(use off-line pocket
pc) in time,so we forbid employees to change clock of pocket pc.I don't kown
How to do it althrough I thought about it for long time.
2:Because security requirement, when Employee lost his pocket pc, My
program must delete all important data. so I want to develop a screen
protect program which like settings password of pda,when device unused for
some times,my program require user to log on, after fail to log on three
times ,My program delete all data. I have searching for the document about
it for several days,but I did't found it.
someone please remind me to resolve the two problems!
thanks in advance!

 

[James McCutcheon]

You cant stop people from using "ROM" based objects directly such as clock
etc.

The only way to really solve this is to make kiosk style application that
runs fullscreen and intercepts all key strokes.
more information: http://www.opennetcf.org/Forums/topic.asp?TOPIC_ID=502

 

[Chris Tacke, eMVP]

You can use a CeRunAppAtEvent notification and find out whenever the time is
changed and change it back. You *might* be able to overwrite the default
time control panel applet. It would have to be done in C/C++ and not sure
the protection level in PPC and I don't have one to check.

-Chris

 

[Jan Yeh [MVP]]

As James said, you have to implement kiosk mode preventing user
from access other applications in Pocket PC.

And you need to implement a timer mechanism to show your
screen savor or login screen after idling for a period of time.

That article in OpenNETCF.org forum would helps a lot!
--
Best Regards,
Jan Yeh

eMVP, MCAD, .NETcf Developer
Mobile Mind Company @ Taiwan