C / C++ / MFC Discussion Boards

David Crow26-Jun-06 5:07

26-Jun-06 5:07

You must wait until the window exists before it can be updated. What part of that are you not understanding? Confused | :confused:

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: Assertion Error

Amit Agarrwal26-Jun-06 18:30

Amit Agarrwal

26-Jun-06 18:30

hi

this is exactly i'm not getting becoz when my dialog is initialized and my button events are working nice.....after this when any call comes then m_hwnd variable value got NULL.

how this is happenning?

i don't think so this problem should take much time..

but i'm not getting proper solution plz help me.

thanx

Re: Assertion Error

David Crow27-Jun-06 3:19

David Crow

27-Jun-06 3:19

aavesh wrote:
...after this when any call comes then m_hwnd variable value got NULL.

Where is this m_hwnd coming from? I would start there (to see why a NULL window handle is being sent to your code).

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: Assertion Error

Amit Agarrwal27-Jun-06 3:23

Amit Agarrwal

27-Jun-06 3:23

i have used follwing code :-

void CTESTsipXtapiDlg::handleOffering(SIPX_CALL hCall)
{

SetWindowText(IDC_Realm,"Hello");
}

it does not show the text in the text box.

do u suggest6 me any other way..could u give me ur yahoo id so we chat directly.

thanx

Re: Assertion Error

David Crow27-Jun-06 3:50

David Crow

27-Jun-06 3:50

aavesh wrote:
SetWindowText(IDC_Realm,"Hello");

Is IDC_Realm a valid window handle (not a resource id)? Have you tried:

GetDlgItem(IDC_Realm)->SetWindowText("Hello");

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: Assertion Error

FarPointer26-Jun-06 4:14

FarPointer

26-Jun-06 4:14

Make IDC_STATIC_NEW_CALL as a control variable of type CStatic and then try SetWindowText on it .

Regards,
FarPointer
Blog:FARPOINTER

Re: Assertion Error

Amit Agarrwal26-Jun-06 4:50

Amit Agarrwal

26-Jun-06 4:50

hello

if i use this then m_hwnd will reinitialize itself.

becoz always at the time of calling a function it gets NULL.

i'm trying now.

byeeee

Re: Assertion Error

Amit Agarrwal26-Jun-06 4:55

Amit Agarrwal

26-Jun-06 4:55

Hello

This Code is not working.

when i use this code then it hangs my system.

plz help me.

thanx

Memory buffer size

hatemtalbi26-Jun-06 2:46

hatemtalbi

26-Jun-06 2:46

Hi,

Is there any way to get the size of an allocated memory buffer knowing only the its address?

Thank you all Smile | :)

Re: Memory buffer size

Viorel.26-Jun-06 2:55

Viorel.

26-Jun-06 2:55

Maybe _msize can help?

Re: Memory buffer size

hatemtalbi26-Jun-06 3:13

hatemtalbi

26-Jun-06 3:13

it doesn't worked for me !!!
The _msize function returns the size, in bytes, of the memory block allocated by a call to calloc, malloc, or realloc.

Thank you anyway

Re: Memory buffer size

Viorel.26-Jun-06 3:47

Viorel.

26-Jun-06 3:47

In case of objects allocated with new operator, the number of items seems to be stored in a word before the pointer:

MyClass * a = new MyClass[10];
__int32 size = *(((__int32*)a) - 1); // contains 10

This works only when the class contains destructor.

The size does not seem to be stored in such manner for destructor-less objects and for fundamental types. But for this cases, _msize appears to return the size in bytes.

Re: Memory buffer size [modified]

James R. Twine26-Jun-06 3:21

James R. Twine

26-Jun-06 3:21

   The short answer, is no. The long answer is that if you know something about the memory, you may be able to. For example, if it is a BSTR you can look 4 bytes before its "handled" address or use SysStringLen(...).

   If you know that the memory came from a particular heap (or heap manager), you may be able to crack the heap structures used to maintain memory allocations. You also need to know where the memory came from in order to use functions like _msize(...), _msize_dbg(...), GlobalSize(...), etc.

   Peace!

-=- James

If you think it costs a lot to do it right, just wait until you find out how much it costs to do it wrong!
Avoid driving a vehicle taller than you and remember that Professional Driver on Closed Course does not mean your Dumb Ass on a Public Road!
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Re: Memory buffer size

hatemtalbi26-Jun-06 3:30

hatemtalbi

26-Jun-06 3:30

Here it is:
LPVOID data = MapViewOfFile(m_hMap, _dwDesiredAccess, 0, _dwOffset, _dwNbBytes);

I need to know the size of the data buffer.
I call this code after resizing a map file with 8ko but I can acess only the first 4ko Frown | :(

could someone help me?!!

Re: Memory buffer size

David Crow26-Jun-06 3:46

David Crow

26-Jun-06 3:46

hatemtalbi wrote:
I need to know the size of the data buffer.

Isn't that what _dwNbBytes represents?

hatemtalbi wrote:
I call this code after resizing a map file with 8ko but I can acess only the first 4ko

What in the world is "ko?"

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: Memory buffer size

hatemtalbi26-Jun-06 3:48

hatemtalbi

26-Jun-06 3:48

no, _dwNbBytes == 0
ko mean kb == 1024 bytes

thx

Re: Memory buffer size

David Crow26-Jun-06 3:50

David Crow

26-Jun-06 3:50

hatemtalbi wrote:
no, _dwNbBytes == 0

Then you simply need to look at the size of the file, since the entire file was mapped.

"The largest fire starts but with the smallest spark." - David Crow

"Judge not by the eye but by the heart." - Native American Proverb

Re: Memory buffer size

hatemtalbi26-Jun-06 3:53

hatemtalbi

26-Jun-06 3:53

that s the problem!!! it seems that the size of the file is larger than the memory buffer returned. I don't understand why Frown | :(

How to create CTabCtrl with dialog as laying

NoName II26-Jun-06 2:29

NoName II

26-Jun-06 2:29

wrote smth like this...

variables:
CTabCtrl m_tabctrl;
CDlg1* dlg1;
CDlg2*dlg2

MyDialog constructors ... :
CDlg1::CDlg1(CWnd* pParent /*=NULL*/)
//: CDialog(CDlg1::IDD, pParent)
{
this->Create(CDlg1::IDD, pParent);
this->ShowWindow(SW_NORMAL);
}

BOOL CMainDlg::OnInitDialog()
{
CDialog::OnInitDialog();
m_tabctrl.InsertItem(0,_T("1111"));
m_tabctrl.InsertItem(1,_T("2222"));

dlg1=new CDlg1(GetDlgItem(IDC_TAB1));
dlg1->ShowWindow(SW_SHOW);// error IsWindow=false
}

Re: How to create CTabCtrl with dialog as laying

Hamid_RT26-Jun-06 2:41

Hamid_RT

26-Jun-06 2:41

Hope I understood your question

<br />
dlg1=new CDlg1();<br />
dlg1->create(...)<br />
dlg->GetDlgItem(IDC_TAB1)->ShowWindow(SW_SHOW); <br />

whitesky

Re: How to create CTabCtrl with dialog as laying

NoName II26-Jun-06 23:06

NoName II

26-Jun-06 23:06

did as u say....

CMyDialog *MyDialog;//in MainDlg header file
MyDialog = new CMyDialog; //in mainDlg constructor

CMainDlg::OnInitDialog{
TC_ITEM TabItem;
TabItem.mask = TCIF_TEXT;
TabItem.pszText = _T("111111");
m_tabctrl.InsertItem( 0, &TabItem );
TabItem.mask = TCIF_PARAM;
TabItem.lParam = (LPARAM)MyDialog;
m_tabctrl.SetItem(0, &TabItem);
VERIFY(MyDialog->Create(CMyDialog::IDD, &m_tabctrl));
MyDialog->ShowWindow(SW_SHOW);
}

CMyDialog constructor
CMyDialog::CMyDialog(CWnd* pParent /*=NULL*/)
: CDialog(CMyDialog::IDD, pParent)
{
/*this->Create(CThumbViewDlg::IDD, pParent);
this->ShowWindow(SW_NORMAL);*/

}

error in HWND CDataExchange::PrepareCtrl
if (pSite == NULL)
{
TRACE(traceAppMsg, 0, "Error: no data exchange control with ID 0x%04X.\n", nIDC);
ASSERT(FALSE);
AfxThrowNotSupportedException();//<-------------------------------------|
}

Re: How to create CTabCtrl with dialog as laying

Hamid_RT27-Jun-06 1:40

Hamid_RT

27-Jun-06 1:40

one question "VERIFY(MyDialog->Create(CMyDialog::IDD, &m_tabctrl));"
your previous code was good this->Create(CThumbViewDlg::IDD, pParent);
this->ShowWindow(SW_NORMAL);
and why you dont use MyDialog->Create();

whitesky

Re: How to create CTabCtrl with dialog as laying

Sarath C26-Jun-06 2:42

Sarath C

26-Jun-06 2:42

NoName II wrote:
dlg1=new CDlg1(GetDlgItem(IDC_TAB1));
dlg1->ShowWindow(SW_SHOW);// error IsWindow=false

you just allocated the memory.
You may have to create the dialog using CreateDialog or CreateDialogIndirect

Sa^Rath.

"Do Next Thing..."
My Blog | Understanding State Pattern in C++

Re: How to create CTabCtrl with dialog as laying

Zac Howland26-Jun-06 4:10

Zac Howland

26-Jun-06 4:10

I'm not sure whether your purpose for this will allow for it, but you might try using a PropertySheet/PropertyPage setup instead of a tab control. You can configure the PropertySheet to look just like a tab control and don't have to write the transition code yourself.

If you decide to become a software engineer, you are signing up to have a 1/2" piece of silicon tell you exactly how stupid you really are for 8 hours a day, 5 days a week

Zac

Re: How to create CTabCtrl with dialog as laying

Sam Hobbs26-Jun-06 14:02

Sam Hobbs

26-Jun-06 14:02

It has been a while since I worked with CTabCtrl, but I put most of what I know in my article Creating Tab Controls Using CTabCtrl[^].

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.