Re: GetKeyState() problem

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From: Jim Merkle (jimmerkle_at_hotmail.com)
Date: 02/10/04 

Date: Tue, 10 Feb 2004 11:22:51 -0800

I've used GetKeyState() in CE2.12, CE3.0, and now in 4.2. In all previous
versions of CE, it would return the input system's current keyboard flag
values.

My matrix keyboard does not export any of the Layout Manager Interfaces.
(MatrixKB.def) Does your keyboard driver export additional Layout Manager
Interfaces defined in the keyboard's def file?

 LayoutMgrGetKeyboardType
 LayoutMgrGetKeyboardLayout
 LayoutMgrGetKeyboardLayoutName
 LayoutMgrGetKeyboardLayoutList
 LayoutMgrLoadKeyboardLayout
 LayoutMgrActivateKeyboardLayout
 IL_00000409
 PS2_AT_00000409

In previous versions of CE, any thread could call this API to determine the
input system's understanding of these modifier flags.

Did this API change scope, or is this Layout Manager layer somehow involved?
Adding the Layout Manager Layer is a fairly invasive task.

Thanks,

Jim

"Paul G. Tobey [eMVP]" <ptobey_no_spam@instrument_no_spam.com> wrote in
message news:uF6yfC27DHA.3288@TK2MSFTNGP11.phx.gbl...
> Hi,
>
> Well, our device and its driver seem to be doing the right thing. Are you
> sure that GetKeyState() and not GetAsyncKeyState() is what you want there?
> I think that, based on how you're trying to use GetKeyState() it won't
work.
> If you read the help in eVC 4 on GetKeyState() you'll see that its return
> value is based on the current state, as far as the message pump for the
> current thread knows, and you aren't running a message pump there.
>
> Paul T.
>
> "Paul G. Tobey [eMVP]" <ptobey_no_spam@instrument_no_spam.com> wrote in
> message news:OApGC517DHA.2644@TK2MSFTNGP11.phx.gbl...
> > Jim,
> >
> > Hmmm. Well, I don't think that they are required, no. Our driver
doesn't
> > conform either, right now. Let me try some GetKeyState() tests and see
> what
> > I see.
> >
> > Paul T.
> >
> > "Jim Merkle" <jimmerkle@hotmail.com> wrote in message
> > news:%23SjVqf17DHA.2432@TK2MSFTNGP10.phx.gbl...
> > > The source you are referring to is nk\kernel\kmisc.c,
SC_GetKeyState().
> > > That is the kernel's method of accessing this function. Coredll.dll
> > > provides access to this function as well (ordinal 860).
> > >
> > > Since none of the keyboard drivers export anything like this function,
> it
> > > isn't part of a keyboard driver, and is contained in another module.
> > >
> > > Since my keyboard driver doesn't conform to the Layout Manager
> Interface,
> > I
> > > was wondering if that had anything to do with it...? Are the Layout
> > Manager
> > > Interface routines requires as of 4.2?
> > >
> > >
> > > Jim
> > >
> > >
> > >
> > > "Paul G. Tobey [eMVP]" <ptobey_no_spam@instrument_no_spam.com> wrote
in
> > > message news:eLj9xl07DHA.2712@tk2msftngp13.phx.gbl...
> > > > The source for GetKeyState() is in the private source code that
ships
> > with
> > > > PB4.2. It appears to me that the MID_GetKeyState entry in an array
of
> > > > keyboard driver functions is being called with the virtual key code
> > passed
> > > > to it as a parameter...
> > > >
> > > > Paul T.
> > > >
> > > >
> > > > "Jim Merkle" <jimmerkle@hotmail.com> wrote in message
> > > > news:%23Vic3g07DHA.2832@tk2msftngp13.phx.gbl...
> > > > > Using Windows CE.NET 4.2, with a Matrix Keyboard Driver.
> > > > >
> > > > > The keyboard driver is sending the appropriate VK codes to the
input
> > > > system
> > > > > in that the Alt key does produce the menus on the CMD or Pocket
Word
> > > > > applications.
> > > > >
> > > > > Does 4.2 route the GetKeyState() though new Keyboard APIs that I'm
> not
> > > > > exposing?
> > > > >
> > > > > Jim M.
> > > > >
> > > > >
> > > > > "Paul G. Tobey [eMVP]" <ptobey_no_spam@instrument_no_spam.com>
wrote
> > in
> > > > > message news:%23Mg6HQ07DHA.2676@TK2MSFTNGP10.phx.gbl...
> > > > > > What kind of device and what version of the OS is this running
on?
> > > > > >
> > > > > > Paul T.
> > > > > >
> > > > > > "Jim Merkle" <jimmerkle@hotmail.com> wrote in message
> > > > > > news:On%23mkK07DHA.1428@TK2MSFTNGP12.phx.gbl...
> > > > > > > It seems I can't read the state of my Alt, Control, or Shift
> > > flags....
> > > > > > >
> > > > > > > The following code was generated to return the status of these
> > > flags:
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
//--------------------------------------------------------------------------
> > > > > > > --------
> > > > > > > int WINAPI WinMain( HINSTANCE hInstance,
> > > > > > > HINSTANCE hPrevInstance,
> > > > > > > LPTSTR lpCmdLine,
> > > > > > > int nCmdShow)
> > > > > > > {
> > > > > > > for(int i=0;i<400;i++)
> > > > > > > {
> > > > > > >
> > > > > > > SHORT sControl = GetKeyState(VK_CONTROL);
> > > > > > > RETAILMSG(1,(L"sControl: 0x%X\r\n",sControl));
> > > > > > >
> > > > > > > SHORT sShift = GetKeyState(VK_SHIFT);
> > > > > > > RETAILMSG(1,(L"sShift: 0x%X\r\n",sShift));
> > > > > > >
> > > > > > > SHORT sAlt = GetKeyState(VK_MENU);
> > > > > > > RETAILMSG(1,(L"sAlt: 0x%X\r\n",sAlt));
> > > > > > >
> > > > > > > SHORT sCaps = GetKeyState(VK_CAPITAL);
> > > > > > > RETAILMSG(1,(L"sCaps: 0x%X\r\n",sCaps));
> > > > > > >
> > > > > > > Sleep(800);
> > > > > > >
> > > > > > > }
> > > > > > >
> > > > > > > return 0;
> > > > > > > } // WinMain
> > > > > > >
> > > > > > >
> > > > > >
> > > > >
> > > >
> > >
> >
>
//--------------------------------------------------------------------------
> > > > > > > --------
> > > > > > >
> > > > > > > The debug messages only return 0x0 regardless of the state of
> the
> > > > input
> > > > > > > system "flags".
> > > > > > >
> > > > > > > If you have any ideas, please let me know...
> > > > > > >
> > > > > > > Thanks,
> > > > > > >
> > > > > > > Jim Merkle
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > >
> > > > > >
> > > > >
> > > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

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