Re: plz Tell me - C / C++ / MFC Discussion Boards

redfish342-Jul-06 23:37

2-Jul-06 23:37

I am a beginner. I am trying to display the HWND when i use certain Win32 functions such as GetForegroundWindow() for debugging purposes. When i use MessageBox or OutputDebugString such as below...

m_foreHwnd1 = GetForegroundWindow();
MessageBox(NULL, (LPCSTR)m_foreHwnd1, "INFO", MB_OK);

OutputDebugString("ForeHwnd1: ");
OutputDebugString((LPCSTR)m_foreHwnd1);
OutputDebugString("\n");

... I get errors like the following:

First-chance exception at 0x77e26673 in SendFocusWin.exe: 0xC0000005: Access violation reading location 0x00090548.
Unhandled exception at 0x77e26673 in SendFocusWin.exe: 0xC0000005: Access violation reading location 0x00090548.

Can i display the HWND so i can see what the heck is going on in my code? What is the How To?

Re: Trying to Display HWND as String

Justin Tay2-Jul-06 23:58

Justin Tay

2-Jul-06 23:58

First thing you need to learn is that you do not cast things without knowing exactly what you are doing as you can shoot yourself in the foot, like what you have done here.

m_foreHwnd1 = GetForegroundWindow();
CString szMessage;
szMessage.Format(_T("ForeHwnd1: 0x%08X\r\n"), m_foreHwnd1);
OutputDebugString(szMessage);

Re: Trying to Display HWND as String

see me2-Jul-06 23:58

see me

2-Jul-06 23:58

Did you try Format function of CString

else try this

CString strHwnd;
strHwnd.Format(_T("Handle is: %d\n"), m_foreHwnd1);
OutputDebugString(strHwnd);

"Dream bigger...Do bigger...Expect smaller"
aji

Re: Trying to Display HWND as String

Abhi Lahare3-Jul-06 0:04

Abhi Lahare

3-Jul-06 0:04

GetForegroundWindow() API will return handle to active window with which user is interacting, so in debugging mode you constantly switch between your app and debug window. so its difficult to know window handle.

Not sure what are you trying to do, but try this to display window handle in output window.

CString str;<br />
str.Format("%x",m_foreHwnd1);<br />
OutputDebugString(str);

Hope this helps

Re: Trying to Display HWND as String

see me3-Jul-06 0:19

see me

3-Jul-06 0:19

If u r able to solve ur problem with our answers then please tel it so that we get some confidence

"Dream bigger...Do bigger...Expect smaller"
aji

Wrong Forum

redfish343-Jul-06 23:03

redfish34

3-Jul-06 23:03

I think i posted on the wrong forum. I now see that there is a forum that supports STL questions, which i think would help come up with a ANSI version of the solution you folks provided. Sorry. But thanks for the excellent response!

plz Tell me

ashish dogra2-Jul-06 23:34

ashish dogra

2-Jul-06 23:34

HI PLZ TELL ME HOW TO CREATE SPLIT WINDOW IN MFC(SDI)
I CREATE IT BUT IT DOES NOT WORK
I ALREADY PUT MY QUESTION BUT NOBODY SOLVE MY PROBLEM
PLZ SOLVE BY GIVING EXAMPLE

Ashish Dogra
MCA
Noida

Re: plz Tell me

_AnsHUMAN_ 2-Jul-06 23:44

_AnsHUMAN_

2-Jul-06 23:44

If you really want to split a window and know how it is done a simple way is to Create a new MFC Application and in the fourth or Fifth step(I don't remember exactly) you can choose for Window Explorer view instead of MFC View.
In this way you will be able to see a window split in two parts just like the explorer.
If you want to see the code open the mainframe.cpp file and there you can study
OnCreateClient function

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: plz Tell me

ashish dogra3-Jul-06 0:02

ashish dogra

3-Jul-06 0:02

thanks sir
but i want to split it into four or more panes and also add scroll bars for each window.
plz tell me sir

Ashish Dogra
MCA
Noida

Re: plz Tell me

_AnsHUMAN_ 3-Jul-06 0:05

_AnsHUMAN_

3-Jul-06 0:05

You just have to get with that in the same manner as in my previous post.Just pass the number of partitions you create to CreateStatic and that number of classes that are derived from CView will help.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: plz Tell me

Abhi Lahare3-Jul-06 0:12

Abhi Lahare

3-Jul-06 0:12

try this:

BOOL CMainFrame::OnCreateClient(LPCREATESTRUCT lpcs, CCreateContext* pContext)<br />
{<br />
// TODO: Add your specialized code here and/or call the base class<br />
BOOL res = m_splilter.CreateStatic(this,2,1);<br />
m_splilter.CreateView(0,0,RUNTIME_CLASS(CsplView),CSize(0, 200), pContext);<br />
m_splilter.CreateView(1,0,RUNTIME_CLASS(COtherView),CSize(200, 200), pContext);<br />
return TRUE;<br />
}

Where CsplView is a default view class generated by Wizard
and COtherView is class derived from Cview.

Hope these help.

Listbox Scrollbar issue

Sarath C2-Jul-06 23:32

Sarath C

2-Jul-06 23:32

Can we subclass scrollbar of an listbox or combobox into a custom one?

SaRath.

"It is your attitude, not your aptitude, that determines your altitude - Zig Ziglar."
My Blog | Understanding State Pattern in C++

Changing Active View

_Tom_2-Jul-06 23:27

_Tom_

2-Jul-06 23:27

Dear All,

I have a MDI application and I'm currently trying to programmatically change the active view.

So in sort I have a combo box on my toolbar which list the views currently open.

When I select a different view in this combobox I want that view to come into focus. Basically it should do exactly the same as selecting the view from the 'Window' main menu option.

I have tried sending the WM_MDIACTIVATE message to the main frame but this doesn't seem to work.

Any suggestions would be gratefully received.

Many thanks

Tom

Re: Changing Active View

Viorel.2-Jul-06 23:38

Viorel.

2-Jul-06 23:38

I would suggest you the MDIActivate member of CMDIFrameWnd class.

I hope it works.

Re: Changing Active View

_Tom_3-Jul-06 0:59

_Tom_

3-Jul-06 0:59

Hi

Thanks for the suggestion of using MDIActivate, unfortunately this doesn't seem to do trick when I call the following:

pMainFrm->MDIActivate((CWnd*)pView);

Where pView is a pointer to the view I want to activate and bring to the front of all other view windows.

I was wondering if I should be casting here and whether I had used the function correctly.

Thanks

Tom

Re: Changing Active View

Viorel.3-Jul-06 1:26

Viorel.

3-Jul-06 1:26

I suppose the parameter of MDIActivate should be a frame window (CMDIChildWnd) which contains your view.

Try this:

CWnd * p = pView->GetParent();
ASSERT_KINDOF(CMDIChildWnd, p);
pMainFrm->MDIActivate(p);

Re: Changing Active View [modified]

Cliff Hatch3-Jul-06 11:36

Cliff Hatch

3-Jul-06 11:36

I wrote the following procedure to activate views programatically. It's a bit specialised, but I hope it might give you some useful clues. The bit underneath the comment "//There is already a View displaying this parent..." activates the view pointed to by pView.

CKernelView* CMainFrame::ActivateView(CModel* pParentModel)
{
	//Activate new or existing view containing pParentModel

	CKernelView *pView, *pActiveView;
	CWnd* pBar;
	CMDIFrameWnd *pFrame;
	CMDIChildWnd *pChild;

	pBar = GetDlgItem(IDD_NAVIGATOR_BAR);

	//Get a pointer to the active view (there are three stages to this)
	pFrame = (CMDIFrameWnd*)AfxGetApp()->m_pMainWnd;		//Get a pointer to the active MDI window
	pChild = (CMDIChildWnd *) pFrame->GetActiveFrame();		//Get the active MDI child window.
	pActiveView = (CKernelView*)pChild->GetActiveView();	//Get the View attached to the active MDI child window

	if (pActiveView->m_pParentModel == pParentModel)
		pView = pActiveView;	//The required parent model is already in the active view
	else if (pParentModel->m_pShadow != NULL)
	{
		//There is already a View displaying this parent, activate its frame
		pView = pParentModel->m_pShadow->m_pView;
		pFrame = (CMDIFrameWnd*)pView->GetParentFrame();
		pFrame->ActivateFrame(SW_RESTORE);
	}
	else if (pBar->IsDlgButtonChecked(IDC_TRACK_NEW))
		pView = pParentModel->OpenView(m_pDocViewed, pParentModel->m_PlantFlag);	//Open new window
	else
	{
		//Reuse current window
		pView = pActiveView;
		pView->ChangeModel(pParentModel);	
	}

	return pView;
}

Best Regards

Cliff

-- modified at 17:36 Monday 3rd July, 2006

Urgent :- How to read the unicode file with C/C++

Rocky Marrone2-Jul-06 23:26

Rocky Marrone

2-Jul-06 23:26

Hi guys i got stuk in a problem........
i want to read the unicode file with C/C++......

thnx in advance

here is the piece of code

FILE* fp = NULL;
wchar_t* buf = (wchar_t*)malloc(sizeof(wchar_t) * 200);
wchar_t* retbuf = NULL;

if ((fp = fopen("d:/GRCasual.txt", "r")) == NULL) // opens the file
{
return 0;
}

while(!feof(fp))
{
/*fseek(fp,sizeof(char),SEEK_CUR); */
retbuf = fgetws(buf, 200, fp);
}

if( fp )
fclose(fp);

return 0;

Best Rgards
Rocky

Re: Urgent :- How to read the unicode file with C/C++

Justin Tay3-Jul-06 2:08

Justin Tay

3-Jul-06 2:08

I shall assume you are trying to read a UTF16LE (with BOM) file and I shall also assume you are compiling with UNICODE defined.

FILE* fp = NULL;
wchar_t buf[201];
wchar_t bom;

if ((fp = fopen("c:\\GRCasual.txt", "r")) == NULL) // opens the file 
{
  return 0;
}

size_t read = fread(&bom, sizeof(bom), 1, fp);
if(bom == 0xFEFF)
{
  while(!feof(fp))
  { 
    read = fread(buf, sizeof(buf[0]), (sizeof(buf) / sizeof(buf[0])) - 1, fp);
    buf[read] = '\0';
    MessageBox(NULL, buf, L"Text", MB_OK);
  }
}

if( fp )
  fclose(fp);

return 0;

But i think it would be better to use this instead. If you use the C functions like fopen you can't open files with unicode filenames...

http://www.codeproject.com/file/stdiofileex.asp[^]

Re: Urgent :- How to read the unicode file with C/C++

Rocky Marrone3-Jul-06 2:51

Rocky Marrone

3-Jul-06 2:51

hey dude can u tell me whatz the problem in this code .........
or how can i remove the problem from this code

best regards
Rocky

Re: Urgent :- How to read the unicode file with C/C++

Justin Tay3-Jul-06 2:56

Justin Tay

3-Jul-06 2:56

Huh? Is there a problem with the code I posted? If you don't describe your problem clearly how can you expect people to bother helping you? You didn't even state what type of unicode file you are reading. UTF8? UTF16? UTF32? Big Endian? Little Endian? With or without BOM?

how to enumerate domain name list?

host282-Jul-06 23:23

host28

2-Jul-06 23:23

After user start windows, user may choose local logon or network logon. when network logon choosed, domain name list is available for user.
My question is how to enumerate domain name list by winapi. I　have known how to enumerate domain server name.but I don't know how to get domain name list. could you take a advise?
thank.

bob

C++

Nirmal Khatri2-Jul-06 23:02

Nirmal Khatri

2-Jul-06 23:02

in a project when we design header files for ex. a importbutten.h or sample.h
we start like this

#if !defined(AFX_IMPBUTTON_H__E6F7CDB9_87FB_4CB2_BC6B_3CD7D2DEBC8A__INCLUDED_)
#define AFX_IMPBUTTON_H__E6F7CDB9_87FB_4CB2_BC6B_3CD7D2DEBC8A__INCLUDED_

so how this bracket term is declared, what is pattern Confused | :confused:

my id is
nirmal_ec1984@rediffmail.com

Re: C++

Cedric Moonen2-Jul-06 23:05

Cedric Moonen

2-Jul-06 23:05

This is generated by class wizard and the purpose is to have one unique identifier string (probably using date and time info and things like that). So that's why it looks so complicated. But you could simply replace that string with one of yours (anything you want, but it must be unique in your complete project).

Cédric Moonen
Software developer

Charting control

Adding a toolbar in Win32 Application

Cyber Friend2-Jul-06 22:56

Cyber Friend

2-Jul-06 22:56

Hi,
I have to add a toolbar to my win32 application. Can anyone tell the way to do this , or provide the link to any article about it?

Cyber Friend

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