How can i receive the hardware key button event On Windows phone 8 App?

[Ethen Park]

How can i receive the hardware key button event On Windows phone 8 App?

I have many problem,

I developed the WP8 App in the WP Device OEM Manufacturers.
So I can access to "OS, Device Driver, App".
But there are various MS documents, By First Time,
The developement is too hard.
The WP 8 is available features are very limited. The Windows CE / WM is a very different behavior.

I want to access the OS Layer by the API (Funtion)

Back button : Success. I found this key event.
Home button : ??? (I don't know)
Search button : ??? (I don't know)
Volume Up / Down : Just working volume.
Camera Key : Can i change the default camera app?
Power Key : Can i optionally lock the power key?
OEM Key (Barcode Key) : Push the button, I want to execute the My App?

Have you ever used these methods can I?
- Named Event
- SendMessage / PostMessage
- Other Communication

I guess the Key-Point "How can i communicate Device driver <-> App"

I am studying now the following Function.
- Service Agent
- IPC

Please help me any infomation the you think good... Have a nice day.

 

[WanderingTraveler]

You should really ask this in the Developers' Corner.

But, since this is already here, I'll lend you what I know.

Windows ley is hardcoded to bring you to Start (quick press) and the voice control agent (long press). Search will send you to...the Bing Search page.

For Volume Up/Down, and the hardware lock button, ask the dev behind Quick Tiles. He might know.
As for the rest, I think it's better to contact Microsoft directly, or as I suggested earlier, ask this question in the Developers' Corner.
(Actually, just have this moved by a mod.)

 

[Ethen Park]

Thanks for your comment.
I will contact Microsoft directly.
I will write the question in the Developers' Corner.