Re: Intercepting 'multimedia keys'

From: Randy Aull \(MSFT\) (randyau_at_microsoft.com)
Date: 09/16/04 

Date: Thu, 16 Sep 2004 12:15:17 -0700

All of these devices use HID (human interface device). You can open these
devices directly (at least the multi-media buttons, the keyboard keys are
opened securely by Windows). You can then use the HidP and HidD APIs to
crack the reports.
Another option is to use WM_INPUT.

For details on using these APIs, see MSDN (look for WM_INPUT), or the
hclient sample in the DDK.
There are also several books written that include details on HID.

Randy 

-- 
This posting is provided "AS IS" with no warranties, and confers no rights.
"Steve McLellan" <sjm.NOSPAM AT fixerlabs DOT com> wrote in message 
news:u146rw2mEHA.3684@TK2MSFTNGP10.phx.gbl...
>
> "William DePalo [MVP VC++]" <willd.no.spam@mvps.org> wrote in message
> news:OTkoIS2mEHA.3392@TK2MSFTNGP15.phx.gbl...
>> "Steve McLellan" <sjm.NOSPAM AT fixerlabs DOT com> wrote in message
>> news:udo7AH2mEHA.2096@TK2MSFTNGP15.phx.gbl...
>> > Does anyone know if it's possible (and if so, how) to intercept presses
> on
>> > 'multimedia keys' you find on keyboards?
>>
>> If the vendor is playing by the rules and if the o/s in question is ME,
> 2K,
>> XP or 2K+3, the simple thing to do is to respond to the WM_APPCOMMAND
>> message. At that point the keyboard software has mapped the keystroke
>> message into an application command like "Play" for example.
>>
>
> On further investigation, it would appear that they're not playing by the
> rules (or at least I'm not getting any APPCOMMAND message)... the 
> bounders!
> Oh well, I shall investigate further another time...
>
> Steve
>
>