C / C++ / MFC Discussion Boards

Nikolaou6-Dec-04 0:08

6-Dec-04 0:08

Dear Antti,

Thank you for the info. Is there a specific socket API that can be used from driver-code, or the win2sock API is ok?

Nikos

Re: Virtual serial port and TCP/IP

Antti Keskinen6-Dec-04 6:14

Antti Keskinen

6-Dec-04 6:14

The Windows Sockets 2 API is just fine. Remember to link with the libraries and triple-check your code for performance/logical errors. A driver program is running in the kernel mode, and a mistake/crash in there is fatal to the operating system. A thorough checking and simulation of all possible error states must be done.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Re: Virtual serial port and TCP/IP

Nikolaou6-Dec-04 23:37

Nikolaou

6-Dec-04 23:37

I've included winsock2.h, but the compiler complains about syntax errors in winbase.h

Any hints;

Nikos

Re: Virtual serial port and TCP/IP

Antti Keskinen8-Dec-04 8:03

Antti Keskinen

8-Dec-04 8:03

Without knowing any more precise information about the error itself it's pretty difficult to help you out.

Because having an actual syntax error in the Platform SDK is quite unprobable, I would suggest that you double-check the source code files you have. Try compiling the project without the Winsock header. Try adding the necessary Windows version definitions before including any header files from the Platform SDK. For information about the version defines, see 'Using the SDK Headers'.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

IP Address Converted to a Number

jerry1211a11-Nov-04 4:30

jerry1211a

11-Nov-04 4:30

Hi,

I want to convert an IP address(dotted quad)...to a number. Can someone tell me how to do this?? I believe it can be converted to a unsigned long. Once converted how can it be converted back to the original dotted quad format??

Thanks.
Jerry
Smile | :)

Re: IP Address Converted to a Number

Antony M Kancidrowski11-Nov-04 7:07

Antony M Kancidrowski

11-Nov-04 7:07

Assuming an IP address in the form a.b.c.d

This will work on a 32bit machine with unsigned long as 32 bits and char as 8bits.

typedef union
{
  unsigned long nIPAddressAsNumber;
  struct
  {
    unsigned char a;
    unsigned char b;
    unsigned char c;
    unsigned char d;
  } dotted;
} IPAddressUnion;

Ant.

I'm hard, yet soft.
I'm coloured, yet clear.
I'm fruity and sweet.
I'm jelly, what am I? Muse on it further, I shall return! - David Walliams (Little Britain)

Re: IP Address Converted to a Number

geo_m11-Nov-04 19:39

geo_m

11-Nov-04 19:39

Try these functions from Winsock2.h

inet_addr - converts a string containing an (Ipv4) Internet Protocol dotted address into a proper address for the IN_ADDR structure. (unsigned long)

and

inet_ntoa - converts an (Ipv4) Internet network address into a string in Internet standard dotted format

Raw Sockets on XP SP1

Anonymous11-Nov-04 3:21

Anonymous

11-Nov-04 3:21

I'm trying to get a raw packet sent out on XP SP1. Supposedly, I should be able to do this on SP2 also (I'm not trying to spoof the source) but I have SP1 installed.

I'm using the following code to create the socket:

sd = WSASocket(AF_INET, SOCK_RAW,IPPROTO_RAW, 0, 0, 0);<br />
    if (sd == INVALID_SOCKET) {<br />
        cerr << "Failed to create raw socket: " << WSAGetLastError() <<<br />
                endl;<br />
        return -1;<br />
    }

What happens is an ARP request is sent, then the packet is sent but the Ethernet header is generated by the OS. I shouldn't even see the ARP request if I'm truly using raw sockets. The exact same thing happens when I run this on Win98 so something's missing - I just don't know what.

Searches on google, ... turn up hundreds of pages of debate on the SP2 issue but nothing that I could find in terms of examples of how to use the XP raw sockets.

Any help would be greatly appreciated.

Thanks,
Dave

Re: Raw Sockets on XP SP1

Antti Keskinen11-Nov-04 7:20

Antti Keskinen

11-Nov-04 7:20

The answer is probably in the AF_INET family. As stated in the MSDN documentation under "TCP/IP Raw Sockets", it is said that

Note The Microsoft implementation of TCP/IP on Windows is capable of opening a raw UDP socket.

As the AF_INET family specifies the TCP/IP family, this note might mean that because WSASocket asks the service provider to create a socket that supports the required parameters, it will create a raw UDP socket. UDP packets include the Ethernet header, so that would explain why the header is generated. As for the ARP request that I can't explain.

Dunno how close to truth this is, as I haven't needed any raw sockets myself.

-Antti Keskinen

----------------------------------------------
The definition of impossible is strictly dependant
on what we think is possible.

Help!! How to access Static control from other class

VikramDelhi11-Nov-04 3:13

VikramDelhi

11-Nov-04 3:13

HI I am new to MFC VC++. I want to creat a Button control in VC++. I created cMyButton class derived from CButton.

I want that if i move the cursor on the button, it should display some text in one of the static controls on my Dlg.

is there a way to pass the pointer of the static control to the cMyButton class.

I added some code like this:

CStatic m_static;

cMyButton::SetStaticCtrl(CStatic &cstatic)
{
m_static = cstatic;
}

void cMyButton::OnMouseMove(UINT nFlags, CPoint point)
{
m_static->SetWindowText("This is test! OK");

CButton::OnMouseMove(nFlags, point);
}

Confused | :confused:

But above code gives errors. Pl. Frown | :(

((help me solving this.
Tell me how to access controls on Dialog from CButton derived classes. OMG | :OMG:

Re: Help!! How to access Static control from other class

GDavy11-Nov-04 3:29

GDavy

11-Nov-04 3:29

as you said you want to pass the pointer, however you pass the static control by reference and then copy it...
make your m_static member of CMyButton a pointer like:
CStatic *m_pStatCtrl;

make your SetStaticCtrl like:
void CMyButton::SetStaticCtrl(CStatic* pStatCtrl)
{
m_pStatCtrl = pStatCtrl;
}

and finally you onmousemove should look like

if( NULL != m_pStatCtrl )
m_pStatCtrl->SetWindowText(... );
//and here the rest of the func...

It would be good to set you m_pStatCtrl pointer to NULL in the constructor of CMyButton just as a precaution..
hope this helps you...
Greetings,
Davy

Re: Help!! How to access Static control from other class

VikramDelhi13-Nov-04 23:16

VikramDelhi

13-Nov-04 23:16

Hi Thanks a lot for your help.
Its working for me.
Smile | :)

Shell Question - Get Parent PIDL

Marcus Spitzmiller11-Nov-04 3:12

Marcus Spitzmiller

11-Nov-04 3:12

Howdy -

I have a fully qualified PIDL (i.e. LPITEMIDLIST struct), and I am completely at a loss as to how to get the parent (fully qualified) PIDL from it?

Any thoughts?

Marcus Spitzmiller

"Why must life be so hard? Why must I fail at every attempt at masonry?" - Homer

Re: Shell Question - Get Parent PIDL

Michael Dunn11-Nov-04 11:14

Michael Dunn

11-Nov-04 11:14

If you have a new enough OS, you can call SHBindToParent()

--Mike--
LINKS~! Ericahist | 1ClickPicGrabber | CP SearchBar v2.0.2 | C++ Forum FAQ | You Are Dumb

How to draw Multiple-Documents in one view

br0kera11-Nov-04 2:20

br0kera

11-Nov-04 2:20

Hi Guys,
I have a question. I have many Documents with data, and i want to draw the graphics of all of them in just one view. but i cannot find a solution yet. Any suggestions? Confused | :confused:

Re: How to draw Multiple-Documents in one view

bryce11-Nov-04 12:50

bryce

11-Nov-04 12:50

try using a splitter window?
bryce

---
To paraphrase Fred Dagg - the views expressed in this post are bloody good ones.
--

Publitor, making Pubmed easy.
http://www.sohocode.com/publitor

Our kids book :The Snot Goblin

Closing Dialogs

jj92111-Nov-04 1:23

jj921

11-Nov-04 1:23

I know this is simple to most users but I am new at this.

I want to close down a dialog screen as soon as as an option to open another
dialog (using a button), so that I am only left with certain screens and not
access to all dialog screens.

Many thanx,

Phil

Re: Closing Dialogs

eli1502197911-Nov-04 2:15

eli15021979

11-Nov-04 2:15

For each window use it's own DestroyWindow() function.

Re: Closing Dialogs

David Crow11-Nov-04 2:17

David Crow

11-Nov-04 2:17

If it is a modal dialog, call EndDialog().

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Access members from a dialog to the Viewframe

Ibana11-Nov-04 0:50

Ibana

11-Nov-04 0:50

Hi there all experts!

I have an app where I want to access a string that is being set in a Dialog. I use MFC and the Doc/View structure.

I now want to be able to pass it on to the View class but I havent been able to do so.

The Dialog is an own class that I have included into my CvtkSDIApp.cpp file where all the others Doc/View/Frame are included. Look below to see
..
#include "MainFrm.h"
#include "vtkSDIDoc.h"
#include "vtkSDIView.h"
#include "StressesDlg.h"
...
I access the dialog from the mainframe

I have tried to add an getView function in my StressesDlg class to be able to get hold of the view string member that I want to use.

// CStressesDlg dialog
//forward declaration
class CvtkSDIView;

class CStressesDlg : public CDialog
{

public:
CStressesDlg(CWnd* pParent = NULL); // standard constructor
virtual ~CStressesDlg();
CVtkSDIView * GetView();
private:
CVtkSDIView * GetView;

};

// and In my implementaion file

CVtkSDIView * CStressesDlg::GetView()
{
return View;
}

// it doesnt like this at all it doesnt recongiazie my view (CVtkSDIView) as a class.
//I have tired with and without forward declaration of the CVtkSDIView class in the dialog class as you can see above.

Regards,

peter

How to pass paramter to GUI based Application

Azghar Hussain11-Nov-04 0:11

Azghar Hussain

11-Nov-04 0:11

Hi Friends,
I have a small problem. I have a VB application which will call an .EXE file which is developed in MFC. While calling an EXE file it will pass the paramter to that EXE file. Problem is I have to create that .EXE file in MFC. I don't how to create a MFC applcation which accepts paramter.
Thanks in Advance.
Best Regards,
Promise

If you have faith in the cause and
the means and in God, the hot
Sun will be cool for you.

Re: How to pass paramter to GUI based Application

Kapoor Vikrant11-Nov-04 0:40

Kapoor Vikrant

11-Nov-04 0:40

Duplicate question
See the answer in the previous Question.
Regards

Re: How to pass paramter to GUI based Application

David Crow11-Nov-04 2:23

David Crow

11-Nov-04 2:23

You can do this via the m_lpCmdLine member variable, or the __argc and __argv global variables. If you MFC application uses main() as its entry point, you can also use the first two parameters of it, typically argc and argv.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

Help plz

eli1502197910-Nov-04 23:53

eli15021979

10-Nov-04 23:53

Hi,
Can someone tell me how to get the address of bluetooth device(BT_ADDR )?
I'm tring to set up Bluetooth communication between my PC and another BlueTooth device using WinSock Extensions and in order to connect the other device i need thse address.

Regards,
Eli

crash in ExitProcess

avivhu10-Nov-04 23:18

avivhu

10-Nov-04 23:18

Hi,

I have problem using MFC,

the software behavior until now was

Visual Basic process invoke dlls wrote in c++ that using MFC (DAO),

now I want to change the flow of the program

Visual Basic process invoke dll's of c++ ,the c++ dlls create new process that use again the dll's of c++

after the new process terminate(after he work properly), when he exit he fail when he try unload the dll

MFC42D in stage of checking memory,

two notes

1) in the release the problem not appear

2) when I run the process as independent procees (not invoked from his parent process)

the problem not appears

can someone have Idea what the problem

Thanks Aviv

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