C / C++ / MFC Discussion Boards

«_Superman_»27-Jun-09 17:40

27-Jun-09 17:40

Assuming you're using MFC, override the OnSetActive function of the CPropertyPage derived class.
This is called every time a property page is selected.
From this function you could resize the parent sheet using GetParent()->SetWindowPos(....
But you may not be able to get the required page size from OnSetActive because the page is resized to the largest page size. You may have to do that from other functions like OnInitDialog.

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

Re: Resizing PropertySheet.

FISH78627-Jun-09 17:55

FISH786

27-Jun-09 17:55

Thank you.

pointer-to-pointer cannot be used to allocate huge matrices

ro_milano27-Jun-09 6:38

ro_milano

27-Jun-09 6:38

Creating a dynamic 2-dimensional array (matrix) using a pointer-to-pointer works for small matrices. If I try to allocate huge matrices (with new), not necessarily larger than the available memory, no bad_alloc exception is thrown and linux becomes very slow!
With one dimensional array (vector) it works perfectly: as soon as you exceed ram+swap a bad_alloc exception is thrown.
Can anybody confirm?
Is this due to the fact that if the matrix is huge each element of the array of pointers has to point to numerous elements and it is not guaranteed that consecutive memory is available??

how can i get lpstore value.

santhosh-padamatinti27-Jun-09 1:56

santhosh-padamatinti

27-Jun-09 1:56

Hi,
I am writing a mapi sample, where mapi intializing is done perfectly, also logon is also happens perfectly, but the third function that is
"HrOpenExchangePrivateStore(lpSession,&lpStore)", function always returning false value, please tell me what should give the value here for lpstore.
I am usin the following link.
http://support.microsoft.com/kb/200181/EN-US/

thanx in advance

sampath-padamatinti

Add Virtual Function in VC6 missing in VS2008

sashoalm27-Jun-09 1:56

sashoalm

27-Jun-09 1:56

When I need to override a function like CDocument::OnOpenDocument, in VC6 I'd use the "Add Virtual Function" from class view context menu, but it's missing in VS2008. Is the feature moved to some place else or is it missing?

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Re: Add Virtual Function in VC6 missing in VS2008

«_Superman_»27-Jun-09 2:38

«_Superman_»

27-Jun-09 2:38

It is available in VS 2008, only thing is that it is different from VC6.
Take Class View, right click on your document class or which ever class.
Select Properties.
One of the icons on the top is Overrides.
That is what you're looking for.

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

Re: Add Virtual Function in VC6 missing in VS2008

sashoalm27-Jun-09 2:47

sashoalm

27-Jun-09 2:47

Thanks for the help, «_Superman_», I don't think I would have found it on my own.

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

converting Strucutre to Byte array

jalsa G26-Jun-09 23:58

jalsa G

26-Jun-09 23:58

Hello,

i have a structure and i want to change the structure data to bytearray

struct test {
char a;
int b;
};

could any one help in this regard.

Jalsa

Re: converting Strucutre to Byte array

chandu00427-Jun-09 0:01

chandu004

27-Jun-09 0:01

did you try with memcpy.
hope that should work for you.
but, if you can let us know the purpose, we can give better suggestions.

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

Re: converting Strucutre to Byte array

jalsa G27-Jun-09 0:06

jalsa G

27-Jun-09 0:06

I need to send the data on tcp socket before that i have MD5 the packet data data.

so i want to convert the structure data to byte.

regards

Jalsa

Re: converting Strucutre to Byte array

chandu00427-Jun-09 0:11

chandu004

27-Jun-09 0:11

try with memcpy.

jalsa G wrote:
before that i have MD5 the packet data data

can you explaing this a bit more clearer?

--------------------------------------------
Suggestion to the members:
Please prefix your main thread subject with [SOLVED] if it is solved.
thanks.
chandu.

Re: converting Strucutre to Byte array

CPallini27-Jun-09 0:41

CPallini

27-Jun-09 0:41

Well a struct is a just bunch of (adjacent) bytes, hence you can pass the address of the struct (and the proper size) to the sending function.
Of course if endianess is a issue then you have to handle it.

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

Re: converting Strucutre to Byte array

«_Superman_»27-Jun-09 2:51

«_Superman_»

27-Jun-09 2:51

Also the byte alignment can sometimes cause problems.

For example with a byte alignment of 4 bytes, the following structure would be of 8 bytes length.

struct test {<br />
char a;<br />
int b;<br />
};<br />

Doing a memcpy will write 8 bytes to a byte array while the needed size is 5 bytes.
In such cases you would need a #pragma pack(1) before declaring the structure.

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

Re: converting Strucutre to Byte array

kumar sanghvi27-Jun-09 3:01

kumar sanghvi

27-Jun-09 3:01

Hi if possible please try to suggest me any solution for the thread Setting Font.. which
i posted below...

Re: converting Strucutre to Byte array

CPallini27-Jun-09 4:28

CPallini

27-Jun-09 4:28

Indeed. Anyway you may send only sizeof(char)+sizeof(int) bytes. Of course then you've to make sure sizeof(int) is the same on both the sides. Roll eyes | :rolleyes:

Does it have a part for C++ builder?

favorxx26-Jun-09 21:20

favorxx

26-Jun-09 21:20

I've found the C/C++/MFC, but not found the C++ builder, does it have one for C++ builder in this website? Confused | :confused:

Re: Does it have a part for C++ builder?

CPallini26-Jun-09 23:37

CPallini

26-Jun-09 23:37

Do you mean a forum for C++ Builder? No we haven't. Anyway you try to ask your question here.
Smile | :)

Re: Does it have a part for C++ builder?

favorxx27-Jun-09 2:19

favorxx

27-Jun-09 2:19

Thank you very much

How to read footer at a sector using C++/VC++

Shiv Murti Pal26-Jun-09 20:51

Shiv Murti Pal

26-Jun-09 20:51

How to read footer at a sector using C++/VC++

Write PE with VC6 [modified]

tuan111126-Jun-09 17:51

tuan1111

26-Jun-09 17:51

Hi!
I want to write to PE run on empty OS.
It help winAPI run on "Empty OS"
Please,full code & guide
Thanks : -D
-D -D -D -D -D -D
Vietnam.
by:tuan1111 Smile | :)

modified on Monday, July 20, 2009 9:24 PM

Re: Write kernel OS

Michael Schubert26-Jun-09 23:52

Michael Schubert

26-Jun-09 23:52

You're not giving up, are you?

tuan1111 wrote:
I'm reading bootloader

Try to read an English course first.

Alternatively, run your post through several, randomly selected languages on translate.google.com, I'm sure it will make more sense then.

tuan1111 wrote:
I say the hard things I want them

What?

tuan1111 wrote:
Please provide code

Let me correct that for you:
Pleeze sendz codez

Re: Write kernel OS

sashoalm27-Jun-09 1:37

sashoalm

27-Jun-09 1:37

The above post wouldn't be out of place in this site[^]

Smile | :)

There is sufficient light for those who desire to see, and there is sufficient darkness for those of a contrary disposition.
Blaise Pascal

Context sensitive help in MFC app

Sternocera26-Jun-09 10:39

Sternocera

26-Jun-09 10:39

Hello,

I'm developing an MFC application that I'd like to provide context sensitive help for. Does MFC provide such a facility? I think that .chm files are deprecated in Windows vista - something called MAML is used instead.

My questions is, what is the modern, preferred way to create context sensitive help within MFC?

Regards,
Sternocera

[SOLVED] Help needed with Alphablend function [modified]

Rozis26-Jun-09 10:01

Rozis

26-Jun-09 10:01

Is there anbody out there who has a working code snippet that uses WinApi function Alphablend()?
Can Alphablend() be used with a bitmap that has no alphachannel?

Thanx

modified on Sunday, June 28, 2009 5:00 AM

Re: Help needed with Alphablend function

PJ Arends26-Jun-09 11:05

PJ Arends

26-Jun-09 11:05

I use it on a splash screen.

header file:

typedef BOOL (WINAPI ALPHABLEND)(HDC, int, int, int, int, HDC, int, int, int, int, BLENDFUNCTION);
typedef ALPHABLEND* LPALPHABLEND;

class ...
{
...
   HINSTANCE m_hLib;
   LPALPHABLEND m_lpfnAlphaBlend;
...
};

source file:

// in class c'tor
        m_hLib = LoadLibrary(_T("msimg32.dll"));
        if (m_hLib != NULL)
        {
            m_lpfnAlphaBlend = (LPALPHABLEND)GetProcAddress(m_hLib, "AlphaBlend");
        }

// in class d'tor
    if (m_hLib != NULL)
    {
        FreeLibrary(m_hLib);
        m_hLib = NULL;
    }


BOOL C*********::OnEraseBkgnd(CDC* pDC) 
{
    CDialog::OnEraseBkgnd(pDC);

    if (m_lpfnAlphaBlend != NULL)
    {
        CRect rc;
        GetClientRect(rc);

        BITMAP b;
        if (GetObject(m_hBitmap,
                      sizeof(BITMAP),
                      &b))
        {
            CDC DC;
            DC.CreateCompatibleDC(pDC);
            int s = DC.SaveDC();

            DC.SelectObject(m_hBitmap);
            
            BLENDFUNCTION bf = {0};
            bf.BlendOp = AC_SRC_OVER;
            bf.SourceConstantAlpha = 0x20;

            m_lpfnAlphaBlend(*pDC,
                             (rc.Width() - b.bmWidth) / 2,
                             (rc.Height() - b.bmHeight) / 2,
                             b.bmWidth,
                             b.bmHeight,
                             DC,
                             0,
                             0,
                             b.bmWidth,
                             b.bmHeight,
                             bf);
            DC.RestoreDC(s);
        }
    }
	
    return TRUE;
}

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I may be crazy
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