C / C++ / MFC

Re: Varifying Socket Connection :: Winsock

11-May-02 5:17

Hi.

I was wonder about the best way to varify if a socket is currently active. In other words, I need a way to determine if there is a connect on a socket. This is just for command update UI. Basically, if the socket is active, I enable/disable something. If not, I enable/disble something.

How about this code?

// if (mysocket == WSAENOSOCKET)
// socket is invalid or inactive

Thanks,
Kuphryn

Nish Nishant11-May-02 6:10

Re: Varifying Socket Connection :: Winsock

11-May-02 6:10

Call getsockname on the socket. If you get an error, call WSAGetLastError and chk and see if the error code is WSAENOTSOCK

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

valikac11-May-02 7:11

11-May-02 7:11

Okay. Thanks.

johnnie2 posted a different solution using a similar approach to setting pointers to NULL. Your solution looks like it is a more sophisticated and safer approach.

Here is a link to the code I mentioned.

http://www.cprogramming.com/cboard/showthread.php?s=b3cf15b75e3287ca197b18fc2d335361&postid=111612#post111612

Kuphryn

owner draw menu...

11-May-02 4:46

Hi,
I just want to set a menu as owner draw...
How do I do That ?

thanks.

Re: owner draw menu...

Nish Nishant11-May-02 6:15

How do I get a module Handle?

11-May-02 6:15

There are numerous owner drawn menu examples here on CP. Take a look at them.

http://www.codeproject.com/menu/

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Neil scsn11-May-02 2:28

Neil scsn

11-May-02 2:28

Hi,
Im using the following to get a list of windows running:

EnumWindows((WNDENUMPROC)AddWinsList, 0);

And within the routine I am doing the following:

BOOL CALLBACK AddWinsList(HWND hWnd, LPARAM lParam)
{
if (!IsWindowVisible(hWnd) || GetWindow(hWnd, GW_OWNER) != NULL)
return TRUE;

TCHAR szClassName[80];
GetClassName(hWnd, szClassName, 80);

if (lstrcmpi(szClassName, _T("Progman")) == 0)
return TRUE;

char szWndText[556];
GetWindowText(hWnd, szWndText, 556);
if (strlen(szWndText) > 0)
AfxMessageBox(szWndText);// just display window title

DWORD p,i;
i=GetWindowThreadProcessId(hWnd,&p);
HANDLE hProcess = OpenProcess(
PROCESS_QUERY_INFORMATION | PROCESS_VM_READ,
FALSE, p);

char FileName[50];
GetModuleFileNameEx(hProcess,?,FileName,49); //? dont know how to get the 'module handle'...

////////////////
I dont know how to get the module handle above in (GetModuleFileNameEx) the second field, anyone any ideas?

thanks

Re: How do I get a module Handle?

Joaquín M López Muñoz11-May-02 2:28

Joaquín M López Muñoz

11-May-02 2:28

Use <a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/psapi_1wz7.asp">EnumProcessModules</a> (only NT/2k/XP) or

<a href="http://msdn.microsoft.com/library/default.asp?url=/library/en-us/perfmon/toolhelp_5450.asp">CreateToolhelp32Snapshot</a>

(9x/ME and 2k/XP.)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

How can i expressed DICOM format image?

mugzzan10-May-02 17:55

mugzzan

10-May-02 17:55

in normal image viewer program,
if i see DICOM image, How can i make code?
another say, i'm making a image viewer
like bmp, jpg format, in viewer seeing dicom format
in program, shall i add which code?
Cry | :((

Re: How can i expressed DICOM format image?

l a u r e n10-May-02 23:33

l a u r e n

10-May-02 23:33

u want to add support for viewing / manipulating images of type DICOM? am i right?
you would have to get some reference on the format and code it urself if you can't find a library that will do it for you
Suspicious | :suss:

"... and so i said to him ... if it can't dance and you can't eat it either f**k it or throw it away"
8028finder.com

Re: How can i expressed DICOM format image?

Mukkie11-May-02 2:10

Mukkie

11-May-02 2:10

Hi!
Try:
http://www.psyc.nott.ac.uk/staff/cr1/dicom.html
Mukkie

Just a picture

lszyn10-May-02 16:02

lszyn

10-May-02 16:02

http://www.yxhome.com/softplus/image/view_window.gif

more : http://softplus.126.com

Re: Just a picture

Shog⁹10-May-02 16:21

Shog⁹

10-May-02 16:21

lszyn wrote:
http://www.yxhome.com/softplus/image/view_window.gif

Doesn't exist mate. Unless you were pointing out how interesting a Chinese 404 error looks...I believe CP is always looking for paying advertisers, but spamming the message boards does nothing but piss people off.

--------

Higher education helps your earning capacity. Ask any college professor.

--Shog⁹ --

Re: Just a picture

Nish Nishant10-May-02 17:07

Changing SOCKADDR_IN Real-Time :: Winsock

10-May-02 17:07

Shog⁹ wrote:
Unless you were pointing out how interesting a Chinese 404 error looks...

ROTFLMAO

Nish Laugh | :laugh:

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

Re: Just a picture

Maxwell Chen10-May-02 21:10

Maxwell Chen

10-May-02 21:10

Nothing interesting! what did you suppose to do? To let people guess the Chinese characters?

No spam here please.
不要在這裡散佈廣告, 謝謝.

Maxwell Chen
People say "No news is good news". Then, no code is good code!?

valikac10-May-02 15:27

Re: Changing SOCKADDR_IN Real-Time :: Winsock

10-May-02 15:27

Hi.

I am working on a simple message program via IP and TCP protocols. Right now, I ininitialize a listening socket on a default (I set at 21). The user can change the port anytime; however, the actual SOCKADDR_IN that was binded with the listening socket is working on the default port.

Is there a way to modify the port in a SOCKADDR_IN in real-time? Do I have to close the listening sock and bind it with a new SOCKADDR_IN with the new port?

Thanks,
Kuphryn

P.S. From my experience with ftp servers and clients, I believe you have to "reconnect." Thus I believe you have to close whatever socket and start over. I would like to make sure that is true.

Nish Nishant10-May-02 17:05

Re: Changing SOCKADDR_IN Real-Time :: Winsock

10-May-02 17:05

kuphryn wrote:
Do I have to close the listening sock and bind it with a new SOCKADDR_IN with the new port?

Yes, you would have to do that, if you want to change the port it is listening on.

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.

valikac10-May-02 18:49

_CrtIsValidPointer in release

10-May-02 18:49

Okay. Thanks.

Kuphryn

Romeozulu10-May-02 14:10

Romeozulu

10-May-02 14:10

Is there a way to get _CrtIsValidPointer() to work in the release version of a build? I'm trying to track-down a memory write that only happens in the release version and would like to know *before* the app faults.

RZ

Rama Krishna Vavilala10-May-02 18:03

Rama Krishna Vavilala

10-May-02 18:03

You may be able to call it using "LoadLibrary" and GetProcAddress but it will not help you. I think you need to do the following :-

1. Change project settings to include debug information for even the release builds if you have not done so

2. Run the program and make it crash consistently atleast two times. See the location and memory address.

3. If the memory address is same all the time then you are lucky.

4. At the start of next debug session set the breakpoint so that it breaks when the memory location changes. Given the address same as you found in step 3.

This will break at all places memory gets overwritten and you can figure the problem out. Smile | :)

Shog⁹10-May-02 18:15

Shog⁹

10-May-02 18:15

whoa! your nick is doing odd things! WTF | :WTF:

--------

Higher education helps your earning capacity. Ask any college professor.

--Shog⁹ --

Rama Krishna Vavilala10-May-02 23:45

Rama Krishna Vavilala

10-May-02 23:45

I tried lot of odd looking nicks to test out something. I deleted those messages but forgot about this one.

Nish Nishant10-May-02 18:22

10-May-02 18:22

Blast!
What's up with your nick?

Nish

Regards,
Nish
Native CPian.
Born and brought up on CP.
With the CP blood in him.