C / C++ / MFC

Re: how to.................

26-Jul-05 2:50

miss taqdees wrote:
can any body help me

Sure. What exactly do you need help with? Show us the code that is giving you trouble and I'm confident that someone here will critique it for you. If, however, you have not bothered to write any of the code yourself and are simply wanting someone to do it for you (i.e., this is the opposite of help), best of luck.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Member 214683926-Jul-05 4:59

Member 2146839

26-Jul-05 4:59

surely i dont wish for someone to write the code for me...........its just that can somebody tell me any functions or classes that might help me............like how to access internet explorer with c++ and how to get access to file menu etc..............not CODE...only some guiging material.................thanks Smile | :)

tapi 2.2 lineMonitorTones

nripun25-Jul-05 22:53

nripun

25-Jul-05 22:53

Someone please tell me how to use lineMonitorTones(.
I want to detect ringback and dialtone.
Thank you

Use of string in switch case

itkid25-Jul-05 22:53

itkid

25-Jul-05 22:53

Hi,
I want to use the string in switch case statement. Can you please help me.

Thanks

berndg25-Jul-05 23:56

berndg

25-Jul-05 23:56

I can only guess and believe you might want to do something like this:

<br />
switch (myString) {<br />
   case "Blue":<br />
      ...<br />
      break;<br />
   case "Red":<br />
      ...<br />
      break;<br />
   ...<br />
}<br />

Trouble is, the C or C++ languages don't do that. C# does. Thus, one solution is to use C#. If you want to use C/C++, you must use nested if/else clauses to emulate the same effect, something like so:

<br />
if (_tcsicmp(myString, _T("blue")) == 0) {<br />
   ...<br />
} else if (_tcsicmp(myString, _T("red")) == 0) {<br />
   ...<br />
...<br />
}<br />

Doesn't look as nice, but, compared to the above fictivious switch statement, gives you control over the comparison algorithm (e.g. use _tcsicmp for case-insensitive comparison, or _tcscmp for case-sensitive comparison), etc.

Iain Clarke, Warrior Programmer

Iain Clarke, Warrior Programmer26-Jul-05 0:23

26-Jul-05 0:23

You cannot use a string in switch cases - the cases have to be constant numberic values.

If the strings are not known at compile time, then you have to use if...else if...else
statements.

If they are known at compile time, then you can precompute hashes of the case strings,
and switch on a hash of the string you want to switch on. Um, that wasn't very clear,
was it?

void DoSomethingDependingOnString (LPCTSTR szSwitchable)
{
    switch (ComputeHash(szSwitchable))
    {
    case 0x4wfe:  // ComputeHash ("I am a string!")
        DoFirstThing ();
        break;

    case 0xfg13:  // ComputeHash ("I am another string!")
        DoSecondThing ();
        break;

    default:
        DoDefaultThing ();
        break;
    }
}

I hope that was little clearer.

Iain.

berndg26-Jul-05 4:18

berndg

26-Jul-05 4:18

I would recommend not to use the hash approach, for at least these:

i) it is hard to maintain - always think a couple of years and several generations of fellow programmers ahead. Who's going to remember how to create the keys, why and when?

ii) it is doomed to fail - hash keys are not unique, so there is a chance that two different strings produce the same key.

markkuk26-Jul-05 12:09

markkuk

26-Jul-05 12:09

berndg wrote:
ii) it is doomed to fail - hash keys are not unique, so there is a chance that two different strings produce the same key.

If you have a finite set of possible strings known at the program development time, you can create a "perfect" hash function[^] that doesn't cause collisions.

How to monitor a file's actions?

itkid27-Jul-05 2:31

itkid

27-Jul-05 2:31

Hi Guy,
Thank for showing interest in my proble. Please refer for below link for good solution.
http://www.codeguru.com/Cpp/Cpp/cpp_mfc/article.php/c4067/[^]

wood25-Jul-05 22:52

wood

25-Jul-05 22:52

The actions include save as , print, local copy, copy on the net and so on.

My english is very poor!

Re: How to monitor a file's actions?

David Crow26-Jul-05 2:57

Sorry,my explanation isn't clear!

26-Jul-05 2:57

Your English is fine, but your explanation is a bit weak. Exactly what is it that you want to do?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

wood26-Jul-05 15:36

wood

26-Jul-05 15:36

I want to monitor the operations to a file which like save as, print, local copy, network copy, attach to a mail and so on.
Have I explain my request clearly?Please help me,thanks!

Re: Sorry,my explanation isn't clear!

David Crow27-Jul-05 2:42

setting Timeout ..Please help me out

27-Jul-05 2:42

Perhaps you are interested in ReadDirectoryChangesW() or FindFirstChangeNotification(). If not, the items you have mentioned are typically found on the menu of an application. What that application does when a particular menu option is selected is indeterminate. Monitoring that would be a chore at best.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Smith#25-Jul-05 22:51

25-Jul-05 22:51

let me tel u in a simpler way,
my application waits for an event from a server. if the request is timed out, the application should terminate but shldn't freeze waiting for the event from the server.

//i tried to use a worker thread which will monitor the value of the
variable "eventDelay"
//so before requesting the event from the server, i'd do like this

int eventDelay=0;
CWinThread *ct=AfxBeginThread(threadtimeout,this);
getEventFromServer(&....,&....&....);
ct->SuspendThread();

//in the thread,(threadtimeout)

void threadtimeout()
{
do
{
Sleep(1000);
eventDelay++;
if (eventDelay>10)
exit(0);
}while(true);
}

but still the application gets hanged up if the server's not sending the event.. Frown | :(

. why..? how to timeout and exit?

regards,
Rookie

Marc Soleda25-Jul-05 23:31

25-Jul-05 23:31

With the information you've provided it seems that you don't need a thread for that. You could use a simple timer (SetTimer) that terminates the app when fires up (OnTimer).

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Smith#26-Jul-05 1:12

26-Jul-05 1:12

can u give me a smal example?

regards,
Rookie

Smith#26-Jul-05 1:17

26-Jul-05 1:17

sorry for the bad naming convention... the function threadtimeout is not to timeout the thread.. its for timing out getEventFromServer() function... please help

regards,
Rookie

Marc Soleda26-Jul-05 1:21

26-Jul-05 1:21

Is it a dialog based application?

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

Smith#26-Jul-05 1:24

26-Jul-05 1:24

ya... MFC dialog..

regards,
Rookie

Marc Soleda26-Jul-05 1:34

26-Jul-05 1:34

Whenever you want to start the count in your dialog, insert:
....
SetTimer(0, 1000, NULL); // 2nd param is the miliseconds until WM_TIMER will be sent, in this case: 1 second.
....

When WM_TIMER is received, it fires up the ON_WM_TIMER event (usally mapped as OnTimer): you could use the VStudio Class Wizard - Message Maps Tab to make it easier.

void CYourDlg::OnTimer(UINT nIDEvent)
{
SendMessage(WM_CLOSE); //exit your app
}

Marc Soleda.

... she said you are the perfect stranger she said baby let's keep it like this... Tunnel of Love, Dire Straits.

David Crow26-Jul-05 3:06

Re: XML parsing using C++

26-Jul-05 3:06

Rookieee wrote:
exit(0);

Remove this. In no way should exit() be used to exit a Windows application, let alone one with multiple threads. See here for the proper way to terminate a thread.

Rookieee wrote:
Sleep(1000);

Why is this here? Using a gratuitous Sleep() like this indicates a bad threading model and adds no value. Reconsider why you think you need it.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

XML parsing using C++

72arpita25-Jul-05 22:47

72arpita

25-Jul-05 22:47

hello all,
i am new to the group.i wanted to know how to parse a xml file using c++ where if the path of the file and the level of the node given that is the level where the element is present.then the parser has to go to the particular element and collect values of sub elements.
thanks

Marc Soleda25-Jul-05 23:27