Detecting particular keys in sub-classed window

[leojose]

Hi all,

Here is the situation:
I have sub-classed a window and would like to get notification for 'Control key up' and 'Shift key up' events only.

My method:
monitor the WM_KEYUP events and check wParam for VK_CONTROL & VK_SHIFT

Why I don't like it:
The WM_KEYUP will be handled whenever a key is pressed. But I wan't to narrow it down to just the Control and Shift keys.

What I am looking for:
I read in MSDN that Ctrl, Shift, Alt etc. fall into System keys or Extended keys. Is there any Windows message that will signal only these type of events?

[golanshahar]

Why I don't like it:
The WM_KEYUP will be handled whenever a key is pressed. But I wan't to narrow it down to just the Control and Shift keys.


you can still narrow it down, if you will put an if :)


if ( vk == VK_SHIFT )
{
// do something
}

so in all other cases nothing will happen, why isnt it enough for you? :confused:

Cheers

[leojose]

why isnt it enough for you? :confused:

I just didn't wan't to load my system by monitoring all 'key up' events if it can be avoided.

The method you suggested was in my mind, but I was looking for an alternative if possible.

[golanshahar]

I just didn't wan't to load my system by monitoring all 'key up' events if it can be avoided.

The method you suggested was in my mind, but I was looking for an alternative if possible.

not sure but maybe ::RegisterHotKey(..) (http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winui/winui/windowsuserinterface/userinput/keyboardinput/keyboardinputreference/keyboardinputfunctions/registerhotkey.asp) can help you.

Cheers