Re: Intercepting keyboard event

From:

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 27 Jul 2006 11:07:51 -0400

Message-ID:

<Outtn5YsGHA.3516@TK2MSFTNGP04.phx.gbl>

hallister007@yahoo.it wrote:

Hi to everyone,
I have a problem in a MFC application...I hope this is the right
newsgroup and that someone would help me :-)

In my MFC application I have a CFormView that contains an ActiveX
control (actually MapPoint Control).
I have created this Control class by means of the class wizard,
selecting "create an MFC class from an ActiveX control": the wizard has
generated a ccontrol1.h file, containing "wrapped" (is right?) method.

My problem is that I want intercept keyboard event, while the control
is running:

I have tried to use the

CControl1::OnKeyDown()

event, but it works only if the control isn't still executing...
I explain: when I load a map into the control, the control itself loose
focus (OnKillFocus event is called) and OnKeyDown() doesn't work.

Is there a way to "intercept" keyboard event, maybe from a higher
level??? I have read that keyboard events go to the component that has
focus....but I'm not able to understand which is it.

In a single-threaded program only one part of the code can execute at
any time. If the control is still executing then your main thread has
no way to simultaneously check for keyboard events. This is not a
keyboard focus issue, it is the nature of a single-threaded program.
(But putting an ActiveX control into a secondary thread is very tricky
and questionable. See the other ActiveX control blocking discussion.) I
would attempt to consult with the control vendor before trying anything
tricky.

--
Scott McPhillips [VC++ MVP]