C / C++ / MFC

12-Oct-06 23:51

Is there any problem in reading line by line or character by character,

while (input.good())
{
input.getline(tmp ,255);
cout<<tmp <<end;
}

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: Working with file???

Galatei13-Oct-06 2:29

Galatei

13-Oct-06 2:29

Hi,

In case of >> operator, string is extracted up to the first whitespace character, and that's why you can't read entire string.
Use getline instead.

working example:

const int slen = 256;
char tmp[slen] = "Sit on my face...";
ofstream ofile("c:\\test.txt", ios::out);
ofile << tmp << endl; ofile.flush();
ofile.close();

char tmp2[slen];
ifstream ifile("c:\\test.txt", ios::in);
ifile.getline(tmp2, 256);
cout << tmp2 << endl;
ifile.close();

Regards

Folder Permission

_tasleem12-Oct-06 21:57

_tasleem

12-Oct-06 21:57

hi all i want to make permission on the folders through vc++ code so that any user does not access those folders and delete their files,basically i m making the document Management System and want for that any help is welcomed.

Tasleem Arif

Re: Folder Permission

Mila02512-Oct-06 22:11

Changing the Font of a Dialog Static Label

12-Oct-06 22:11

Hi,

You will modify files and folders ACLs - this can be useful for you:

Modifying the ACLs of an Object in C++[^]

-----------
Mila

Andy20212-Oct-06 21:52

Andy202

12-Oct-06 21:52

I was trying to change the font of some labels on a dialog, I used the following code:

HBRUSH CTabOne::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)<br />
{<br />
	/* Arrange for the labels to be drawn in yellow on a black background. Also<br />
	need to arrange for the background colour of the dialog to be black. */<br />
<br />
	HBRUSH hbr = NULL;<br />
	// Font for the current waypoint marker<br />
	CFont LabelFont;<br />
	if(nCtlColor == CTLCOLOR_DLG || nCtlColor == CTLCOLOR_STATIC)<br />
	{<br />
		if(pWnd->GetDlgCtrlID() == IDC_STATIC_COMMAND)<br />
		{<br />
			// Set up the Font for the Group boxes<br />
			LabelFont.CreateFont (14,14,0,0,FW_BOLD, FALSE, FALSE, 0, DEFAULT_CHARSET,<br />
				OUT_CHARACTER_PRECIS, CLIP_CHARACTER_PRECIS, DEFAULT_QUALITY,<br />
				DEFAULT_PITCH, NULL);<br />
			pWnd->SetFont (&LabelFont, TRUE);<br />
		}<br />
	}<br />
	return hbr;<br />
}

And included

ON_WM_CTLCOLOR()

in the message map.

But looking at the processing that is being done ~ 50%, I have got something wrong! Also the labels 'flicker'.

As these are static labels, just need the Font set during dialog initialsation.

A bit confused as to how to set up the OnCtlColor parameters if thats the way to do it.

Any suggestions please.

Andy.

prasad_som12-Oct-06 22:33

12-Oct-06 22:33

Why dont you use CWnd::SetFont() for this purpose? Instead of above code.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Mila02512-Oct-06 22:43

12-Oct-06 22:43

Hi,

instead: pWnd->SetFont (&LabelFont, TRUE);
use: pDC->SelectObject( LabelFont );

and don't forget about delete font object
LabelFont->DeleteObject();

Works pretty good Smile | :)

-----------
Mila

prasad_som12-Oct-06 23:04

12-Oct-06 23:04

Mila025 wrote:
use: pDC->SelectObject( LabelFont );

Why?
SetFont can be called from OnInitDialog. As it needs to be set once. Why you want to set it again and again.(it will be called each time window is painted).

Prasad
Notifier using ATL | Operator new[],delete[][^]

Andy20212-Oct-06 23:14

Andy202

12-Oct-06 23:14

OK, that sounds good just setting it once.

But how do I select the control I want to change the Font in OnInitDialog?

I was selecting the ones in the OnCtlColor procedure.

Andy.

Mila02512-Oct-06 23:20

12-Oct-06 23:20

Hi,

GetDlgItem( IDC_STATIC_COMMAND )->SetFont( &LabelFont, TRUE );

-----------
Mila

prasad_som12-Oct-06 23:20

12-Oct-06 23:20

Andy202 wrote:
But how do I select the control I want to change the Font in OnInitDialog?

CWnd *pWnd=GetDlgItem(IDC_STATIC);//IDC_STATIC , is id of static control
pWnd->SetFont(/*font you want to set*/);

Prasad
Notifier using ATL | Operator new[],delete[][^]

Andy20213-Oct-06 0:47

Andy202

13-Oct-06 0:47

Thanks Prasad, all working as required.

Using this I can make my Dialogs a bit more interesting.

est wishes,

Andy. Big Grin | :-D

Welcome

prasad_som13-Oct-06 0:57

13-Oct-06 0:57

Prasad
Notifier using ATL | Operator new[],delete[][^]

Mila02512-Oct-06 23:17

12-Oct-06 23:17

Hi,

Yes you're right, it can be used with CWnd::SetFont.
I wrote only a little correction to Andy202s code Smile | :)

-----------
Mila

Hamid_RT13-Oct-06 1:04

Hamid_RT

13-Oct-06 1:04

If you have a variable for their you can use of m_Static.SetFont(GetFont());

WhiteSky

David Crow13-Oct-06 3:06

David Crow

13-Oct-06 3:06

See the Extras section of this article.

"Approved Workmen Are Not Ashamed" - 2 Timothy 2:15

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

COM Object

LOUIS Christian12-Oct-06 20:44

LOUIS Christian

12-Oct-06 20:44

The situation is :
-launch of release application using my COm object => memory leaks when I use Function to get data with an SafeArray.
- launch of release application in VC++ 6.0 with debug => no memory leak.

What is the difference, what are dll that are used? Have someone an explication?
Thank you for a response Confused | :confused:

and help

LOUIS Christian

Re: COM Object

prasad_som12-Oct-06 21:01

How to lock object externally?

12-Oct-06 21:01

Post code, that giving this problem.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: COM Object

Hamid_RT13-Oct-06 8:15

Hamid_RT

13-Oct-06 8:15

if you have a memory leak you can use of visual Leak detector - Enhanced Memory Leak detection for visual C++ [^]maybe its some helpful for you

WhiteSky

kiranin12-Oct-06 20:12

kiranin

12-Oct-06 20:12

Hi,

For some odd reason, I am not able to Register the COleDropTarget.
I have been working with my project for a while, so I suspect it is
something within my project.

I do have the member variable COleDropTarget m_dropTarget in the header.
Then, in the OnInitialUpdate, I call m_dropTarget.Register(this).

// register drop target
BOOL b = m_dropTarget.Register(this);

It keeps failing at the if(CoLockObjectExternal()) shown below.

Does anybody know what CoLockObjectExternal means?

BOOL COleDropTarget::Register(CWnd* pWnd) 
{ 
 ASSERT_VALID(this); 
 ASSERT(m_hWnd == NULL); // registering drop target twice? 
 ASSERT_VALID(pWnd); 


 LPUNKNOWN lpUnknown = (LPUNKNOWN)GetInterface(&IID_IUnknown); 
 ASSERT(lpUnknown != NULL); 


 // the object must be locked externally to keep LRPC connections alive 
 if (CoLockObjectExternal(lpUnknown, TRUE, FALSE) != S_OK) 
  return FALSE;

How to share data in a same dll loaded by different process?

Best Kiluyar12-Oct-06 19:27

Best Kiluyar

12-Oct-06 19:27

Hi,

I write a dll which will be loaded by different application. Currently, I need to share some data between the same dlls loaded in different processes. How can I do? Is there a simple way?
I consider to use a file to stored the data shared. But I must write/read the data frequently. So I think use file is not a good way.

Re: How to share data in a same dll loaded by different process?

Don Fletcher12-Oct-06 21:10

Don Fletcher

12-Oct-06 21:10

Hi,

You should look into "shared memory" - it is relatively easy and will accomplish what you want.

Try this one: http://www.codeproject.com/threads/sm.asp[^]

Re: How to share data in a same dll loaded by different process?

Blake Miller13-Oct-06 4:29

Blake Miller

13-Oct-06 4:29

You can place the data into a shared data segment.
Be sure to protect access to it with some sort of thread-safe synchronization mechanism.

Any sufficiently gross incompetence is nearly indistinguishable from malice.

access database

With_problem12-Oct-06 18:02

With_problem

12-Oct-06 18:02

Good day everyone, Rose | [Rose]

I'm doing a project with Vc++6.0 database MS Access

I'm struggling with the connection and coding with database.

Does anyone know where I can get a tutorial of how to connect to database and manipulate with data?

Thanks for your help in advance.

Re: access database

prasad_som12-Oct-06 19:15