Re: Design question - C / C++ / MFC Discussion Boards

Re: Design question

Nishad S8-May-06 1:58

Nishad S

8-May-06 1:58

Did you try PreCreateWindow?

- NS -

Re: Design question

YaronNir8-May-06 2:22

YaronNir

8-May-06 2:22

can't do that, because it is called before the window is being attached....
so basically no valid hWnd...

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: Design question

Nishad S8-May-06 22:03

Nishad S

8-May-06 22:03

Then what about PreSubclassWindow?

- NS -

Re: Design question

YaronNir9-May-06 0:10

YaronNir

9-May-06 0:10

with that it worked fine for me Smile | :)

thanks

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: Design question

Nibu babu thomas8-May-06 1:44

Nibu babu thomas

8-May-06 1:44

YaronNir wrote:
this sure can work, but it is too complex, i don't want to implement WindowProc....

I don't think it's too complex. BTW I use it frequently for initlialization purposes. This acts as a common entry point. Yeah it look dirty. Dead | X|

Nibu thomas
Software Developer

Faqs by Michael dunn

Re: Design question

David Crow8-May-06 3:43

David Crow

8-May-06 3:43

YaronNir wrote:
so the question is on which function override should i place the font changing?

Do it in your class' constructor. Then in the class' OnChildNotify() method, look for the WM_CTLCOLORBTN message.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Design question

YaronNir8-May-06 3:46

YaronNir

8-May-06 3:46

not sure i understand what to do with WM_CTLCOLORBTN ??? how is is related to the font changing?

i want all my buttons to be in font tahoma size 11.

can u show my snippet of what you mean?

thanks

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: Design question

David Crow8-May-06 3:52

David Crow

8-May-06 3:52

YaronNir wrote:
can u show my snippet of what you mean?

See the Extras section of this article.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Design question

YaronNir8-May-06 3:55

YaronNir

8-May-06 3:55

Excellent! thanks a lot

maybe you can help me with one more thing not related to this thread?

how do i get the "My documents" folder using shell api, every api i use with CSIDL_MYDOCUMENTS returns INVALID_ARG....maybe a code snippet could help?

thanks again

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: Design question

David Crow8-May-06 4:11

David Crow

8-May-06 4:11

YaronNir wrote:
how do i get the "My documents" folder using shell api, every api i use with CSIDL_MYDOCUMENTS returns INVALID_ARG....maybe a code snippet could help?

The docs plainly state that you cannot use SHGetSpecialFolderPath() or SHGetFolderPath() to get virtual paths.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Design question

Hamid_RT8-May-06 4:17

Hamid_RT

8-May-06 4:17

yes he can use CSIDL_PERSONAL instead CSIDL_MYDOCUMENTS

Re: Design question

David Crow8-May-06 4:20

David Crow

8-May-06 4:20

I'm well aware of that approach. The question was about CSIDL_MYDOCUMENTS, however.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: Design question

YaronNir8-May-06 4:20

YaronNir

8-May-06 4:20

yes i've managed to do it Smile | :)

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: Design question

YaronNir8-May-06 4:23

YaronNir

8-May-06 4:23

DavidCrow wrote:
See the Extras section of this article.

each MyButton i create using Create is working fine with the code you've reffered me to.
but i've i have buttons in the resource editor and i use the DDX to subclass them, then although i'm breaking at the OnNotifyChild method with a breakpoint, the font of the text is not changed??

any ideas?

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: Design question

YaronNir8-May-06 20:40

YaronNir

8-May-06 20:40

combining the 2 methods you've suggested solved 100% my problem Smile | :)

thanks very much for all the help

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

DirectX exclusive mode

Nishad S8-May-06 1:14

Nishad S

8-May-06 1:14

Hi,

I have an application that runs using DirectX full screen exclusive mode. Can I launch another program ( which is not using DirectX, say Notepad or Windows Calculator ) into my application's fullscreen mode?

Thank you.

- NS -

m_hamidimehr8-May-06 0:46

m_hamidimehr

8-May-06 0:46

I want to change My Menu Font,But I can Not It.
Please,guide me

Re: Menu

Ganesh_T8-May-06 1:00

Ganesh_T

8-May-06 1:00

Try using CMenu and CFont classes

Cheers
"Peace of mind through Technology"

Re: Menu

Hamid_RT8-May-06 1:32

Hamid_RT

8-May-06 1:32

See here[^]

Null Pointer Function Call

ajmalsiddiqi8-May-06 0:40

ajmalsiddiqi

8-May-06 0:40

Plz See the following Example first.

Class A
{
Void Func(){AfxMessageBox("Function Class A");}
}
int Main()
{
A *pClassA;
pClassA=NULL;
pClassA->Func();

}
The output is a MessageBox displayed:
AfxMessageBox("Function Class A");

Why this output is displayed because pointer has no memory plz explain this behaviour in the context of VC++ 6.0/MFC.Is this compliler Bug or My VC++6.0 is corrupt or any other.....?

Yours Sincerely
Ajmal Siddiqi

ajmalsiddiqui

-- modified at 6:45 Monday 8th May, 2006

Re: Null Pointer Function Call

Stephen Hewitt8-May-06 0:58

Stephen Hewitt

8-May-06 0:58

This works because:
- The member function doesn't access any non-static members and thus doesn't use the (NULL) this pointer; and
- Isn't virtual so doesn't use this this to get a vtable pointer during function call.

Steve

Re: Null Pointer Function Call

Cedric Moonen8-May-06 0:59

Cedric Moonen

8-May-06 0:59

It is because classes don't have their own functions (they is only one function for each instances of the classes, and there is an implicit 'this' parameter that is passed to the function to identify the instance). Thus, the function exists even if the object doesn't exist.
Now, if this function will access one of the member variable from the class, you will get an exception (because member variables are not 'shared') because you are trying to access invalid memory.

Re: Null Pointer Function Call

David Crow8-May-06 4:01

David Crow

8-May-06 4:01

If you look at the assembly code, you'll notice that the call to Func() is the same no matter if pClassA is NULL or not.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

member array initialization

Naveen8-May-06 0:32

Naveen

8-May-06 0:32

Hi,

Can I initialize a member array of a class from the constructor

class test<br />
{<br />
<br />
    int Myarray[10];<br />
    test()<br />
    {<br />
<br />
    }<br />
};

here I want to set the value of all elements in Myarray as 0. Is there any way to do it with out using memset()...?

nave

Re: member array initialization

ajmalsiddiqi8-May-06 0:50

ajmalsiddiqi

8-May-06 0:50

dear why do You not use loop to initialize array with ur desired value.

ajmalsiddiqui

-- modified at 6:50 Monday 8th May, 2006

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