C / C++ / MFC

SandipG 24-Jun-08 0:43

24-Jun-08 0:43

did you manage to get it working it or not can you paste some code snippets for the same.

Regards,
Sandip.

danginkgo24-Jun-08 0:50

24-Jun-08 0:50

This is the callback function for the main (view) window:

<br />
<br />
LRESULT CALLBACK FldViewWndProc (HWND   hWnd,<br />
                                 UINT   wMessage,<br />
                                 WPARAM wParam,<br />
                                 LPARAM lParam){<br />
PluginInstance* This;<br />
................................................<br />
 case WM_KILLFOCUS:<br />
   This = (PluginInstance*) GetWindowLong(hWnd, 0);<br />
   if((HWND)wParam==This->hwndView)<br />
     register hotkeys<br />
   break;<br />
<br />
<br />
case WM_SETFOCUS:<br />
   This = (PluginInstance*) GetWindowLong(hWnd, 0);<br />
   if((HWND)wParam==This->hwndView)<br />
     unregister hotkeys<br />
   break;<br />
..................................................<br />
}<br />

danginkgo

SandipG 24-Jun-08 0:57

24-Jun-08 0:57

are you getting the same values in both cases you mentioned in your previous reply.

Regards,
Sandip.

danginkgo24-Jun-08 0:59

Re: WM_KILLFOCUS problem [modified]

24-Jun-08 0:59

yes, the same values

danginkgo

danginkgo24-Jun-08 0:58

24-Jun-08 0:58

In the documentation I found that the wParam for WM_KILLFOCUS is the window handler for the window that receive focus, so I'll get this message in the WindowProc function if I click on the main window.
So, I can't use this message, because I want to unregister the hotkeys when the main window loses focus, not immediately before it gains focus.
Is it wright what I wrote?

danginkgo

modified on Tuesday, June 24, 2008 7:31 AM

danginkgo24-Jun-08 1:35

24-Jun-08 1:35

The problem is I don't get any message in WindowProc if the window loses focus.

danginkgo

SandipG 24-Jun-08 2:06

24-Jun-08 2:06

Hi
I tried it in a sample application
1> Main window with two edit controls.
2> In WM_LBUTTONDOWN i called SetFocus(hWnd);

I noticed is that if i dont call setfocus explicitly i dont get the WM_SETFOCUS notification.

and moreover when i switch between the two edit control i dont get any notification.
may be you can try something like following. i dont see any need of using GetWindowLong.
case WM_LBUTTONDOWN:
SetFocus(hWnd);
break;
case WM_KILLFOCUS:
unregisterkeys;
break;
case WM_SETFOCUS:
registerkeys;
break;

I hope it helps.

Regards,
Sandip.

danginkgo24-Jun-08 2:16

24-Jun-08 2:16

My code is exactly like what you wrote.
The problem is I don't get the WM_KILLFOCUS message only when I return to the app window. If the focus is on the app window and I go to other window then I don't get any message.

danginkgo

SandipG 24-Jun-08 2:34

24-Jun-08 2:34

No when i go from app window to edit control i get the WM_KILLFOCUS notifiction.
also when i call SetFocus() i do get WM_SETFOCUS notification.

Regards,
Sandip.

danginkgo24-Jun-08 2:34

24-Jun-08 2:34

It works now. It seems that the problem was that I called MessageBox() function in my code with wrong HWND. That massed up the messages.
I took it out of the code and it works fine.
Thank you very much for your help.

danginkgo

SandipG 24-Jun-08 2:35

24-Jun-08 2:35

Good its working now You are welcome Smile | :)

Regards,
Sandip.

KarstenK23-Jun-08 21:50

KarstenK

23-Jun-08 21:50

Check from which window you get these messages. D'Oh! | :doh:

Greetings from Germany

David Crow24-Jun-08 3:15

David Crow

24-Jun-08 3:15

danginkgo wrote:
I want to register some values when the window has keyboard focus and unregister the values when the window looses focus.

It sounds like you need to use WM_ACTIVATEAPP instead.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

danginkgo24-Jun-08 3:30

text overlay on video data

24-Jun-08 3:30

I tried using WM_ACTIVATEAPP message, but I don't get it in the main WindowProc function.
Do you have any suggestions?

danginkgo

ashishmax4723-Jun-08 20:55

ashishmax47

23-Jun-08 20:55

I have a pointer to video image buffer as follows in BYTE pointer;
BYTE *pdata
now I want to overlay text on that video image .how can I achieved that task.

Ashish

enabling applicaion for UAC

subramanyeswari23-Jun-08 20:48

subramanyeswari

23-Jun-08 20:48

Hi,

I followed the steps in the link
http://www.professionalvisualstudio.com/blog/2007/10/05/enabling-your-application-for-uac-on-vista/[^]

After building the application, i tried to run the application in vista machine. But UAC dialog pops up.

What should i do.

Regards

Re: enabling applicaion for UAC

krmed24-Jun-08 2:01

krmed

24-Jun-08 2:01

It's hard to say why since you don't provide enough information, but there are many reasone that you might see the UAC prompt.

First, if your manifest file has

<requestedExecutionLevel  level="requireAdministrator" />

this will force the UAC to appear for any user running the program. You can use

<requestedExecutionLevel  level="asInvoker">

which allows the program to run without admin rights, and won't prompt with the UAC...

UNLESS
If your program attempts to perform a Vista restricted function (for instance, writing to a file in anywhere in the Program Files directory) then the UAC prompt will still appear.

Other causes can be the name of your executable file, contents of the VERSIONINFO resource in your .rc file and others.

Check out this thread[^] for more info - especially post #15.

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

GUI thread priority

rp_suman23-Jun-08 20:33

rp_suman

23-Jun-08 20:33

What is the priority of MFC application's GUI thread?

Regards,
Suman

--
"Programming is an art that fights back!"

SandipG 23-Jun-08 20:51

23-Jun-08 20:51

Default value is THREAD_PRIORITY_NORMAL
you can use SetThreadPriority() to set desired priority.

Regards,
Sandip.

Naveen23-Jun-08 20:52

Naveen

23-Jun-08 20:52

Why dont you try your self using GetThreadPriority() function?

nave

[OpenedFileFinder]

rp_suman23-Jun-08 20:55

rp_suman

23-Jun-08 20:55

Thanks for your help!!

I thought these functions of setting and getting thread priority are for only user defined threads, but it seems we can use them for any thread.

But setting priority to GUI thread will work?

Thanks,
Suman

--
"Programming is an art that fights back!"

Rajesh R Subramanian23-Jun-08 21:34

Rajesh R Subramanian

23-Jun-08 21:34

rp_suman wrote:
I thought these functions of setting and getting thread priority are for only user defined threads,

There is nothing called as an user defined thread. There are only two types of threads - UI and worker.

rp_suman wrote:
But setting priority to GUI thread will work?

Why not try it?

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

SandipG 24-Jun-08 0:49

24-Jun-08 0:49

Now i got it why you are called gray man Smile | :)

Regards,
Sandip.