Re: ? Keyboard Hook (Combo-Keys, Owner Window)

From:

"AliR $VC++ MVP$" <AliR@online.nospam>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 5 Jun 2008 11:39:41 -0500

Message-ID:

<yEU1k.3599$ZE5.1734@nlpi061.nbdc.sbc.com>

1. Ignore the Ctrl key down message, when you get a character you are
intrested in then check the state of the control or the shift or the alt key
by using either GetKeyState, or GetKeyboardState.

2. Store the pointer to you button in a global somewhere where the hook
function has access to it.

AliR.

"Alec S." <@> wrote in message
news:O%23lM0axxIHA.1436@TK2MSFTNGP05.phx.gbl...

Hi,

I'm trying to create a hotkey control that can detect any keys or
combinations
(at least more than the standard one). I've modeled mine after XMPlay's
shortcut
hotkey control: a button that you click which traps its next keyboard
event.

It's coming along great. I've created the control, basing it on CButton,
which
calls SetWindowsHookEx from OnBnClicked. I can trap the next key and call
UnhookWindowsHookEx in the hook proc. I've now run into two problems:

(1) I cannot figure out how to detect combinations (eg Ctrl+A,
Shift+Win+F5,
etc.) The hook procedure triggers after any key, preventing combinations
from
registering; ie, I get Ctrl by itself.

(1b) I need a way of interpreting the captured hotkey as a string.

(2) I need a way to call the (button) control's SetWindowText from the
hook
procedure and to store the detected hotkey and its modifiers in the
control.

I have no idea about problem (1). For problem (2), I have in the past
worked
around similar situations by passing a pointer to the instance of the
window to
the callback, but can't do that here. I have hacked a workaround by
storing the
control's handle in a global static, HWND during its PreSubclassWindow. It
seems
to work, but if I have more than one control in a dialog, won't they all
use the
same HWND variable?

I can't seem to find any sample code that demonstrates anything like this.

How can I do this? Thanks a lot.

--
Alec S.
news/alec->synetech/cjb/net