Re: prolog help - C / C++ / MFC Discussion Boards

JohnCz27-Nov-09 20:14

27-Nov-09 20:14

No, it is not possible, that is the way OS works.
Why is it so important to you?
AS I havew already indicated, if you have to do some long processing you would be much better off, moving processing to a dedicated thread, freeing main thread to do GUI updates and process all other messages without freezing.

JohnCz
MS C++ MVP

Re: Overlap Message on WM_TIMER

KarstenK29-Nov-09 20:36

KarstenK

29-Nov-09 20:36

So the message queue got filled with unworked WM_TIMER messages. What is that positive? If someone needs to handle some stuff he is waiting and nothing is happening. Cry | :((

That is not a good style to write a program Dead | X|

To be honest I would call it a "mistake by design"

Press F1 for help or google it.
Greetings from Germany

prolog help

golisarmi26-Nov-09 10:18

golisarmi

26-Nov-09 10:18

any body could help with prolog programming?

Re: prolog help

CPallini26-Nov-09 20:41

CPallini

26-Nov-09 20:41

Unfortunately this is a C/C++/MFC forum, however, please, let me google that for you... Roll eyes | :rolleyes:

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Re: prolog help

Michael Schubert27-Nov-09 0:11

Michael Schubert

27-Nov-09 0:11

What puzzles me most is that people manage to find this site but seem to be unaware of the existence of search engines...

Re: prolog help

Richard MacCutchan27-Nov-09 1:01

Richard MacCutchan

27-Nov-09 1:01

I was googling something the other day and came across a hit with the exact same question. When I looked closer the first 'answer' was "Try CodeProject and they will give you the answer". If that is always the top hit then little wonder people stop searching at that point.

Re: prolog help

Michael Schubert27-Nov-09 2:30

Michael Schubert

27-Nov-09 2:30

Good point but hardly relevant in this case. Still, you are probably right that in many cases, CP showing up on top of many searches might explain this.

Re: prolog help

Richard MacCutchan27-Nov-09 2:57

Richard MacCutchan

27-Nov-09 2:57

Michael Schubert wrote:
Good point but hardly relevant in this case.

Point taken, but if they used the site which had this entry then they would be redirected here and expect an instant solution.

Re: prolog help

CPallini27-Nov-09 4:48

CPallini

27-Nov-09 4:48

Right!

Re: prolog help

Maximilien27-Nov-09 1:28

Maximilien

27-Nov-09 1:28

Me remember my courses in prolog that one of the most usual answers are

no

or

yes

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Process ID from HWND [solved]

PJ Arends26-Nov-09 7:30

PJ Arends

26-Nov-09 7:30

Ok, I know there is a windows function that allows one to get the Process ID of the app that owns a HWND window handle by passing in the HWND but for the life of me I can not remember what it is. Any ideas?

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

modified on Thursday, November 26, 2009 3:16 PM

Re: Process ID from HWND

«_Superman_»26-Nov-09 8:46

«_Superman_»

26-Nov-09 8:46

GetWindowThreadProcessId

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Re: Process ID from HWND

PJ Arends26-Nov-09 9:17

PJ Arends

26-Nov-09 9:17

That is the one, thanks!

You may be right
I may be crazy
-- Billy Joel --

Within you lies the power for good - Use it!

Listing Windows registered users

RomTibi26-Nov-09 4:11

RomTibi

26-Nov-09 4:11

Is it possible to List Windows registered users? In VC++6 please Wink | ;)

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...
Do not press a desperate foe too hard.

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Re: Listing Windows registered users

Richard MacCutchan26-Nov-09 6:48

Richard MacCutchan

26-Nov-09 6:48

The Win32_UserAccount Class[^] contains the information you are probably looking for, but I am not sure if VC6 will support it; you may need to upgrade to the latest SDK.

Re: Listing Windows registered users

RomTibi26-Nov-09 8:15

RomTibi

26-Nov-09 8:15

Can you give me some implementation example?

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

Re: Listing Windows registered users

Richard MacCutchan26-Nov-09 9:57

Richard MacCutchan

26-Nov-09 9:57

Sorry, no I cannot; I found the MSDN link to the area you need to investigate, but I have no personal experience of this. If you read through the documentation you will find lots of sample code.

Re: Listing Windows registered users

RomTibi26-Nov-09 17:47

RomTibi

26-Nov-09 17:47

Thanks

36. When you surround an army, leave an outlet free.
...
Do not press a desperate foe too hard.

SUN-TZU - Art of War

quick question on polymorphism [modified]

minkowski26-Nov-09 2:19

minkowski

26-Nov-09 2:19

Hi,

Think I have got my hair in a mess,

say I have a function that accepts a base class ptr,

and I want to call a function on a class type that derives from the base class type. Is it possible to just
do a dynamic / static cast on it?

something like

<br />
void func(base* ptr)<br />
{<br />
   //cast down hierachy so i can call my derived class function<br />
   derived * derivedptr = dynamic_cast<derived*>(ptr);<br />
<br />
   //call my derived class function<br />
   derivedptr->derivedfunction();<br />
}<br />

Thanks for any information.

modified on Thursday, November 26, 2009 8:30 AM

Re: quick question on polymorphism

Cedric Moonen26-Nov-09 3:09

Cedric Moonen

26-Nov-09 3:09

The best way to do something like that is to declare the function as virtual in the base class and let the child class override this method. That's the basic principle of polymorphism.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: quick question on polymorphism

«_Superman_»26-Nov-09 9:20

«_Superman_»

26-Nov-09 9:20

Like Cedric Moonen said, you should use virtual functions.
But if you want to do what you're doing, you have to check the return of dynamic_cast for NULL.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Play two audio file in different different Left Right speaker

Shivanand Gupta26-Nov-09 1:46

Shivanand Gupta

26-Nov-09 1:46

hi
i want to play two sound file same time and want to listen the sound of these file
on separtly on left and right speaker,means sound of one file should play on left
speaker and second file should play on right speaker

Re: Play two audio file in different different Left Right speaker

KarstenK26-Nov-09 2:09

KarstenK

26-Nov-09 2:09

this is a nice and simple task: you only got to combine to wave files in a new stereo file. For further information you can consult: https://ccrma.stanford.edu/courses/422/projects/WaveFormat/[^]

Press F1 for help or google it.
Greetings from Germany

Re: Play two audio file in different different Left Right speaker

Shivanand Gupta26-Nov-09 6:59

Shivanand Gupta

26-Nov-09 6:59

Thanks for giving reply

I have no idea to handle this problem.
I need sample code if is possiable.i think direct sound is the solution
but not having correct API.

Re: Play two audio file in different different Left Right speaker

molesworth26-Nov-09 7:48

molesworth

26-Nov-09 7:48

You can download the Direct X SDK from Microsoft, as well as a lot of useful information about it from here.

It's fairly easy to use, and comes with plenty of sample code to get you started.

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