C / C++ / MFC

Cedric Moonen7-Aug-08 2:24

7-Aug-08 2:24

Normally, a thread can't receive a message if it is a working thread. If it is a UI thread, then it can have a message loop and extract messages from its queue. Of course, it can only retrieve messages when it tries to do so and if it is busy doing something else, then you can't extract the message.

Typically, it is not really done this way: you set a flag (e.g. a boolean) in one thread which can be checked in the second thread.
What are you trying to do in fact ? Some context could be usefull to help you.

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

shakumar_227-Aug-08 2:36

shakumar_22

7-Aug-08 2:36

thanks for reply

As I mentioned above it is an UI Thread only.
My query is , I able to post a message to ThreadB , from ThraedA.
When ThreadB was free it receive the message and displayed it.
When ThreadB was doing some process ,it is not displaying the received message .
After completing the ThreadB process only it display this received message.

I want ThreadB to display the Message immediately, when message was posted from ThreadA.

regards
shakumar

shakumar

Cedric Moonen7-Aug-08 2:41

7-Aug-08 2:41

As I explained in my previous post, this is not possible unless, you pump your message loop. This is done for example when you give back control to the MFC lib (when your function exits). It's still one thread so when you are busy in your function, nothing else will be processed for that thread.

Ok, but I also asked you a question: what are you trying to do exactly ? Give some context, it might help. What are you doing in that function that takes so much time ?
Anyway, it is also not a good idea to have lenghty function call in a UI thread, because your UI will be freezed during that time.

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

shaibee7-Aug-08 5:14

shaibee

7-Aug-08 5:14

As Cedric said, you need to pump your messages, while you are busy doing something else. This means you need to add a message loop to your class , and call the loop several times while you are through a long process, to let all the awaiting messages come up.

Something like

MSG msg;
while (PeekMessage(&msg ...))
{
TranslateMessage(&msg);
DispatchMessage(msg);
}

Its never over !

David Crow7-Aug-08 3:05

7-Aug-08 3:05

shakumar_22 wrote:
...ThreadB should immediately display the Received Message .

How (e.g., message box, console, debug window)?

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

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Maximize button

hari_honey7-Aug-08 2:01

hari_honey

7-Aug-08 2:01

Hi,
I wrote one dialog application. For that dialog i have disabled Maximize button. In the context menu also it disabled the maximize button. But my problem is in task manager if i right click on my exe it is showing maximize option and it is maximizing the screen. How to disable this? Smile | :)

Re: Maximize button

Perspx7-Aug-08 2:25

Perspx

7-Aug-08 2:25

You can't do anything about that as your application can still be maximized by using ShowWindow() with SW_MAXIMIZE.

Regards,
--Perspx

"The Blue Screen of Death, also known as The Blue Screen of Doom, the "Blue Screen of Fun", "Phatul Exception: The WRECKening" and "Windows Vista", is a multi award-winning game first developed in 1995 by Microsoft" - Uncyclopedia

Re: Maximize button

David Crow7-Aug-08 3:07

How to get text file format information?

7-Aug-08 3:07

You could try responding to the WM_SIZE/SIZE_MAXIMIZED message with a 0. You could also remove the WS_MAXIMIZEBOX style from the dialog template.

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

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Re: Maximize button

hari_honey7-Aug-08 20:09

hari_honey

7-Aug-08 20:09

I have tried these things also. Still it is not working. Smile | :)

Ahmad Zubair7-Aug-08 1:57

Ahmad Zubair

7-Aug-08 1:57

Hello Friends,

Can anybody plz tell me that is there any function in C++/MFC to get the text file format(ASCII/UniCode/ANSI) information?

Any information/segesion will be appriciated.

Thanks in ADVANCE...... Smile | :)

Re: How to get text file format information?

David Crow7-Aug-08 3:11

MPEG to WMV and MPEG4 conversion problem

7-Aug-08 3:11

Does IsTextUnicode() help?

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

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

lal00127-Aug-08 1:53

lal0012

7-Aug-08 1:53

Hi All,

I have a problem with converting MPEG to WMV and MPEG4.I got a library from net .But it converts MPEG to WMV only.It is not suitable for my needs.I want to convert the MPEG to WMV and MPEG4.Please help me...Very urgent....Thanks in advance......

Sreelal

[Message Deleted]

R@jeev K R7-Aug-08 1:42

R@jeev K R

7-Aug-08 1:42

[Message Deleted]

Re: Dual monitor Problem

Cedric Moonen7-Aug-08 1:50

regarding [callback] attribute of MIDL that is used in RPC.

7-Aug-08 1:50

Oh yes, I remember you: you are the guy who was spamming a lot of articles by posting almost empty messages but with a sig containing tons of links to your website as advertisment... And you continued to do so even when people told you to stop.

Sorry, but I don't support such behavior.

Cédric Moonen
Software developer

Charting control [v1.4]
OpenGL game tutorial in C++

Sameerkumar Namdeo7-Aug-08 1:35

Sameerkumar Namdeo

7-Aug-08 1:35

Hello,
[1]Using explict handle / local rpc(naclrpc) for rpc implementation.
[2]Following function is declared in inferface ".idl" file.
[callback] void DisplayString([in, string] unsigned char *psz);
The function is declared on client side as
void DisplayString(
/* [in] */ handle_t IDL_handle,
/* [string][in] */ unsigned char *psz
)
{
::MessageBox(NULL, (char*)psz, (char*)psz, MB_OK);
}
[3]Problem is server is calling the callback function DisplayString() and the function is getting called on client side but the "psz" paramter is not showing the value that the server is passing while calling DisplayString() function.
[4]Please put some light on the above issue.

Thanks.

Unicode

iayd7-Aug-08 1:28

iayd

7-Aug-08 1:28

Hi,

I want to write a sentance in Arabic in the development tool (Visual Studio 6.0) and I want to display it in a messageBox.But I couldn't write any thing in Arabic although I can write in a MS word document.I changed the language of visual c++ to Arabic by setting Project-Settings-Resources-Language tab.That did not solve my problem.Do you have any suggestion for that?How can I write in Arabic to the MessageBox?

Thanks
ibrahim

Re: Unicode

shaibee7-Aug-08 5:23

shaibee

7-Aug-08 5:23

May be you should try Tools->Options->Environment->International Settings and setting your language there.

You may need to set Arabic for your OS, in control panel first.

Its never over !

Re: Unicode

iayd7-Aug-08 21:57

iayd

7-Aug-08 21:57

Hi,

I couldn't find the Environment tab at the Options part.Are you sure from that?

Thanks

How can referesh a formview?

Le@rner7-Aug-08 1:24

Le@rner

7-Aug-08 1:24

Hi all,

I m using a SDI type splitted application.i m split my view in two columns.

At one side i m using a Treeview and other side i m using a Formview.

in formview i m using a ListCtrl,here on clicking on item of List control i m open a dilog box and change the values of ListCtrl items.

but the changed values are not reflect at same time when i changed.
may be there is problem of refresh window.

so please tell me how can i show changed values at same time.

thanks in advance.

IN A DAY, WHEN YOU DON'T COME ACROSS ANY PROBLEMS - YOU CAN BE SURE THAT YOU ARE TRAVELLING IN A WRONG PATH

Re: How can referesh a formview?

SandipG 7-Aug-08 1:37

SandipG

7-Aug-08 1:37

Are you setting m_List.SetRedraw(FALSE);
before the changing the ListCtrl Items.

Regards,
Sandip.

Re: How can referesh a formview?

David Crow7-Aug-08 3:15

VS 2005 MFC Program Always In Focus

7-Aug-08 3:15

"_$h@nky_" wrote:
in formview i m using a ListCtrl...

From where is this list control getting its data?

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

"The brick walls are there for a reason...to stop the people who don't want it badly enough." - Randy Pausch

Andy2027-Aug-08 1:16

Andy202

7-Aug-08 1:16

I have a typical MFC program with lots of control and display items on its dialog. Several Timers control to regular updates.

But I have just started to notice that the focus is always returning back to my program when its running. This is every second - the main Timer rate.

I think I must have set some properity - but which one?!?

So I have to close down the program to do anything else on the computer.

ANy suggestions please

Windows XP Pro; MFC C++ on VS 2005.

Cheers

Re: VS 2005 MFC Program Always In Focus

Cedric Moonen7-Aug-08 1:31