Re: Disconnecting from the internet programmtically - C / C++ / MFC Discussion Boards

Re: Application Crash error

Hamid_RT18-Dec-07 22:54

Hamid_RT

18-Dec-07 22:54

We are clever guys Laugh | :laugh:

but if you more explain about your program will be helpful.

Re: Application Crash error

Nelek18-Dec-07 23:15

Nelek

18-Dec-07 23:15

Hamid. wrote:
We are clever guys

I like the modestly way you tell it Wink | ;)

Greetings.
--------
M.D.V. Wink | ;)

If something has a solution... Why do we have to worry about?. If it has no solution... For what reason do we have to worry about?
Help me to understand what I'm saying, and I'll explain it better to you
“The First Rule of Program Optimization: Don't do it. The Second Rule of Program Optimization (for experts only!): Don't do it yet.” - Michael A. Jackson

Re: Application Crash error

Hamid_RT19-Dec-07 1:34

Hamid_RT

19-Dec-07 1:34

How to remove the Tittlebar & Menu bar of a SDI application

msr_codeproject18-Dec-07 21:19

msr_codeproject

18-Dec-07 21:19

Hi......
I am working on a SDI (Form based i.e., CFormView) Application. I need to remove the Tittlebar & Menu. Can anybody help me.

Thanks in advance
Sairam

Re: How to remove the Tittlebar & Menu bar of a SDI application

santhoshv8418-Dec-07 21:30

santhoshv84

18-Dec-07 21:30

Hi,

If you dont want Menu and ToolBar in your SDI application.
Comment the Hilighted Lines in this program.

int CMainFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
return -1;

//if (!m_wndToolBar.CreateEx(this, TBSTYLE_FLAT, WS_CHILD | //WS_VISIBLE | CBRS_TOP
// | CBRS_GRIPPER | CBRS_TOOLTIPS | CBRS_FLYBY | //CBRS_SIZE_DYNAMIC) ||
// !m_wndToolBar.LoadToolBar(IDR_MAINFRAME))
//{
// TRACE0("Failed to create toolbar\n");
// return -1; // fail to create
//}

if (!m_wndStatusBar.Create(this) ||
!m_wndStatusBar.SetIndicators(indicators,
sizeof(indicators)/sizeof(UINT)))
{
TRACE0("Failed to create status bar\n");
return -1; // fail to create
}

// TODO: Delete these three lines if you don't want the toolbar to
// be dockable
//m_wndToolBar.EnableDocking(CBRS_ALIGN_ANY);
//EnableDocking(CBRS_ALIGN_ANY);
//DockControlBar(&m_wndToolBar);

return 0;
}

Thanks and Regards.
SANTHOSH V

Tittlebar? Is that save for work?

jhwurmbach18-Dec-07 23:26

jhwurmbach

18-Dec-07 23:26

Hmmm...

Let's think the unthinkable, let's do the undoable, let's prepare to grapple with the ineffable itself, and see if we may not eff it after all.
Douglas Adams, "Dirk Gently's Holistic Detective Agency"

Disconnecting from the internet programmtically

emmmatty118-Dec-07 21:09

emmmatty1

18-Dec-07 21:09

How can i disconnect a computer from using internet after a specified amount of time. The internet connection can be in the form of dial up or LAN/PPP.

Please advice.

Thanks in advance.

Regards,
John.

Re: Disconnecting from the internet programmtically

David Crow19-Dec-07 3:15

David Crow

19-Dec-07 3:15

emmmatty1 wrote:
The internet connection can be in the form of dial up...

If RasDial() was used to make the connection, use RasHangUp() to terminate the connection.

I would think a better solution would be to mimic what happens when you right-click a connection and select Disable. I am not sure what API does this, however. You could try tapping into the Shell (i.e., opening the Network Connections applet in Control Panel, finding the Local Area Connection object, and then invoking its Enable or Disable menu item). I can do this via VBS but have not tried in VC++.

"Normal is getting dressed in clothes that you buy for work and driving through traffic in a car that you are still paying for, in order to get to the job you need to pay for the clothes and the car and the house you leave vacant all day so you can afford to live in it." - Ellen Goodman

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

modified on Wednesday, December 19, 2007 10:04:20 AM

Re: Disconnecting from the internet programmtically

jhwurmbach19-Dec-07 3:35

jhwurmbach

19-Dec-07 3:35

What do you expect "disconnect" to do, when your computer is connected to a LAN with access to the internet?
Or are you talking about your computer actually *being* the router, connected to some sort of DSL or cable modem?

why Visual Studio can not optimize the initialization code?

George_George18-Dec-07 20:35

George_George

18-Dec-07 20:35

Hello everyone,

Why Visual Studio compiler can not optimize in this case? I think this case is almost the same as sample 1, why compiler can optimize sample 1 but can not optimze sample 2?

(sample 2, http://msdn2.microsoft.com/en-us/library/ms364057(vs.80).aspx)

class A {
  public:
    A() {printf ("A: I am in constructor\n");i = 1;}
    ~A() { printf ("A: I am in destructor\n"); i = 0;}
    A(const A& a) {printf ("A: I am in copy constructor\n"); i = a.i;}
    int i, x, w;
};
 class B {
  public:
    A a;
    B()  { printf ("B: I am in constructor\n");}
    ~B() { printf ("B: I am in destructor\n");}
    B(const B& b) { printf ("B: I am in copy constructor\n");}
};
A MyMethod()
{
    B* b = new B();
    A a = b->a;
    delete b;
    return (a);
}
int main()
{
    A a;
    a = MyMethod();
}

thanks in advance,
George

Re: why Visual Studio can not optimize the initialization code?

Nelek18-Dec-07 22:17

Nelek

18-Dec-07 22:17

And what is sample 1 and sample 2?

Greetings.
--------
M.D.V. Wink | ;)

Re: why Visual Studio can not optimize the initialization code?

George_George18-Dec-07 23:13

George_George

18-Dec-07 23:13

Hi Nelek,

Here is sample 2 code. I do not understand why if we optimize by /O2, there is still copy constructor invoked?

http://msdn2.microsoft.com/en-us/library/ms364057(vs.80).aspx[^]

Here is output,

A: I am in constructor
A: I am in constructor
B: I am in constructor
A: I am in copy constructor
B: I am in destructor
A: I am in destructor
A: I am in destructor
A: I am in destructor

class A {
  public:
    A() {printf ("A: I am in constructor\n");i = 1;}
    ~A() { printf ("A: I am in destructor\n"); i = 0;}
    A(const A& a) {printf ("A: I am in copy constructor\n"); i = a.i;}
    int i, x, w;
};
 class B {
  public:
    A a;
    B()  { printf ("B: I am in constructor\n");}
    ~B() { printf ("B: I am in destructor\n");}
    B(const B& b) { printf ("B: I am in copy constructor\n");}
};
A MyMethod()
{
    B* b = new B();
    A a = b->a;
    delete b;
    return (a);
}
int main()
{
    A a;
    a = MyMethod();
}

thanks in advance,
George

Re: why Visual Studio can not optimize the initialization code?

jhwurmbach19-Dec-07 3:47

jhwurmbach

19-Dec-07 3:47

George_George wrote:
I do not understand why there is still copy constructor invoked?

Because for efficiency-reasons,

A a = b->a;

invokes the copy constructor instead of the constructor and the assignment-operator.

Re: why Visual Studio can not optimize the initialization code?

George_George19-Dec-07 3:58

George_George

19-Dec-07 3:58

Thanks jhwurmbach,

You mis-understood my question. My question is NRVO technique is used to optimize to reduce the need to invoke copy constructor. Why in the above code, NRVO does not take effect and copy constructor is still invoked. Smile | :)

regards,
George

What is the Maximum size of WCHAR

santhoshv8418-Dec-07 20:05

santhoshv84

18-Dec-07 20:05

Hi Friends,

I want to know the size of WCHAR.
This is the code line i am using WCHAR InputText[99999]=L"";

I am using this string to read a *.txt file.
But if i choose a 5 mb file. I am not able to read.
It is posible to increase the size

Thanks and Regards.
SANTHOSH V

Re: What is the Maximum size of WCHAR

Don Box18-Dec-07 20:26

Don Box

18-Dec-07 20:26

U can set its value to the maximum positive value of int or to the available memory.

Come online at:-
jubinc@skype

Re: What is the Maximum size of WCHAR

codeII18-Dec-07 20:31

codeII

18-Dec-07 20:31

WCHAR* InputText = ( WCHAR* ) HeapAlloc( GetProcessHeap( ), HEAP_GENERATE_EXCEPTIONS, 5 * 1024 * 1024 );

Re: What is the Maximum size of WCHAR

Peter Weyzen18-Dec-07 21:52

Peter Weyzen

18-Dec-07 21:52

Not many people read the whole file into a buffer. As we say, this solution doesn't scale.

Most people read text files, line by line... only buffering what they need.

If you're writing a text editor... it's a different story... and in that case you should dynamically allocate the text file buffer.

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~<br />
Peter Weyzen<br />
Staff Engineer<br />
<a href="http://www.soonr.com">SoonR Inc -- PC Power delivered to your phone</a>

Re: What is the Maximum size of WCHAR

David Crow19-Dec-07 3:29

David Crow

19-Dec-07 3:29

santhoshv84 wrote:
This is the code line i am using WCHAR InputText[99999]=L"";

Why not use a std::wstring object instead?

my problem is related to file handling

rajneshmalik18-Dec-07 20:05

rajneshmalik

18-Dec-07 20:05

i am working on client server application both are developed on mfc.My problem is that client create a file after writing put it in a directory on server and server is continuously searching that directory and try to open that file but still hold by client.How can i know that particular file is not hold by client.
thank u in advance

Re: my problem is related to file handling [modified]

Nelek18-Dec-07 22:15

Nelek

18-Dec-07 22:15

One solution may be sending a parameter when client ends working with file.

Another possibility (but I don't know if that is ok for you) is to use the "share priviliges" flags of the file. You can create the file to be used only by one application or by more as you want.

Another one would be create another empty file that just hold the name of the first one + _busy or something like that, and deleting that sec file after ending the work with the first one.

P.S. there must most probably be better solutions, my knowledge is limited, this is just a logic think.

Greetings.
--------
M.D.V. Wink | ;)

modified on Wednesday, December 19, 2007 4:22:20 AM

Re: my problem is related to file handling

Iain Clarke, Warrior Programmer19-Dec-07 1:22

Iain Clarke, Warrior Programmer

19-Dec-07 1:22

Nalek came up with some solutions.

Another one... Write to file AAAA.aaa, then when you're done with it, close it, and rename it to BBBB.bbb, and the server can then catch that file.

I hope the server is not in a loop continouusly checking for the file - your users won;t thank you for that. I trust you're using FindFirstChangeNotification etc for this job.

Iain.

Re: my problem is related to file handling

Nelek19-Dec-07 1:49

Nelek

19-Dec-07 1:49

Iain Clarke wrote:
Nalek came up with some solutions.

Another one... Write to file AAAA.aaa, then when you're done with it, close it, and rename it to BBBB.bbb, and the server can then catch that file.

I suppose that is an irony to say my solutions suck. For next times, I prefer a simple "this is bad, is better that". I know I am limited, but I try and from corrections like yours

Iain Clarke wrote:
I trust you're using FindFirstChangeNotification etc for this job

I learn too.

Greetings.
--------
M.D.V. Wink | ;)

Re: my problem is related to file handling

David Crow19-Dec-07 3:32

David Crow

19-Dec-07 3:32

Iain Clarke wrote:
I hope the server is not in a loop continouusly checking for the file...

That's what his "server is continuously searching that directory" comment is implying.

System Restart

Kiran Pinjala18-Dec-07 19:03

Kiran Pinjala

18-Dec-07 19:03

Can we restart the system programatically?
Can you show me tha way?

Thank you.

Saadhinchaali

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