Think you will need to repost this on developer groups as well as google
searching it.

However, I suspect that it is not specifically related to pocket pc, but
rather is a PC based application that does what you need when the PC
looses is associated connection with a specific bluetooth device.

otoh, what I have been using for years is to set up a separate password
protected screensaver and assigning it a "hotkey" which is easy to tap
on the way out... better yet, if you have a programmable keyboard,
assign it to one of the keyboard buttons.

Beverly Howard [MS MVP-Mobile Devices]