C / C++ / MFC Discussion Boards

Re: I love wudi who is AnHui in china. love her best!

CPallini5-May-09 23:07

5-May-09 23:07

_AnsHUMAN_ wrote:
Some may argue: that the use of goto statements being used improperly, far outweighs the slight benefit that they offer in the few instances where their use is preferred.

Someone (else) may argue: using properly a goto possibly discriminate a good coder from a 'Senior Software Developer'...

Software bumpers are for sissies.
--the Klingon programmer
Big Grin | :-D

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

[My articles]

ntdll!ExpInterlockedPopEntrySListFault in C:\WINDOWS\system32\ntdll.dll from Microsoft Corporation has caused an access violation exception (0xC0000005) when trying to read from memory location 0x73656c69 on thread 0

V K 25-May-09 21:03

V K 2

5-May-09 21:03

I am getting this error

ntdll!ExpInterlockedPopEntrySListFault in C:\WINDOWS\system32\ntdll.dll from Microsoft Corporation has caused an access violation exception (0xC0000005) when trying to read from memory location 0x73656c69 on thread 0

I am not knowing what is the cause

Re: ntdll!ExpInterlockedPopEntrySListFault in C:\WINDOWS\system32\ntdll.dll from Microsoft Corporation has caused an access violation exception (0xC0000005) when trying to read from memory location 0x73656c69 on thread 0

Cedric Moonen5-May-09 21:14

Cedric Moonen

5-May-09 21:14

VKupunaram wrote:
I am not knowing what is the cause

We neither. So, if you want to fix the problem, use your debugger to analyze what could be wrong in your code (check where the code crashed, use breakpoints to inspect variables before the crash, use the call stack, ...)

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

CPallini5-May-09 22:27

CPallini

5-May-09 22:27

Really I don't see any flaw in your answer.
Smile | :)

[added]
Ok, now Mr.Univoter is balanced a bit.
[/added]

Cedric Moonen5-May-09 22:45

Cedric Moonen

5-May-09 22:45

CPallini wrote:
Really I don't see any flaw in your answer.

I guess it's because I didn't reply with something like: "The error is on line 34 in the MyFile.cpp file. You have to replace the '.' with a '->'. " Smile | :)

CPallini wrote:
Ok, now Mr.Univoter is balanced a bit.

Thanks

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

ThatsAlok6-May-09 1:18

ThatsAlok

6-May-09 1:18

CPallini wrote:
Really I don't see any flaw in your answer.

humm!m there is no flaw in question but there would be multiple defect in application !

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re:

CPallini6-May-09 1:46

CPallini

6-May-09 1:46

Philosophical mood today?
Big Grin | :-D

Hamid_RT5-May-09 23:25

Hamid_RT

5-May-09 23:25

Did you use of debugger and can you show your code that it generates this error to us?

Of one Essence is the human race
thus has Creation put the base
One Limb impacted is sufficient
For all Others to feel the Mace
(Saadi )

Help native C++ and .net

ashish8patil5-May-09 21:03

ashish8patil

5-May-09 21:03

Hello All,

I develop code in vc++,win32. Now my next part is to make GUI in very short period. If i use C# to make GUI and backend code in vc++.Is it possible.And Please tell good things and bad things if i use like that .and more from you .

Thanks .

Re: Help native C++ and .net

_AnsHUMAN_ 5-May-09 21:25

_AnsHUMAN_

5-May-09 21:25

If your code is in win32 [dll] you can write a RCW[Runtime Callable Wrapper] for the exposed functions and then use them in C#. Alternatively you can also use Interop

Interop is for calling raw DLL exported functions.

RCW (Runtime Callable Wrapper) is used to expose COM objects to .NET classes - ie., to make COM objects callable by .NET code.

You need to google first, if you have "It's urgent please" mentioned in your question.
Wink | ;-)

_AnShUmAn_

Re: Help native C++ and .net

CPallini5-May-09 21:41

CPallini

5-May-09 21:41

ashish8patil wrote:
I develop code in vc++,win32. Now my next part is to make GUI in very short period.

You may also use MFC for this task.

ashish8patil wrote:
If i use C# to make GUI and backend code in vc++.Is it possible.

Yes.

ashish8patil wrote:
And Please tell good things and bad things if i use like that .and more from you .

Well, if you're a C++ developer, then you've to learn C# enough to make the GUI and at least about Platform Invoke [^] (alternatively COM interop [^]), such tasks are, of course, time-consuming.
The good things, I suppose, come from the experience gained about mixing the two worlds.

Eventually you may also conside to develop both GUI and core modules using C# (i.e go manged!).
Smile | :)

Re: Help native C++ and .net

Rajesh R Subramanian5-May-09 21:54

Rajesh R Subramanian

5-May-09 21:54

ashish8patil wrote:
I develop code in vc++,win32. Now my next part is to make GUI in very short period.

You may opt to use MFC instead, which allows you to build dialog based applications, doc/view applications, ActiveX controls, etc., all with the help of wizards and existing templates. Give it a shot and you won't be disappointed.

ashish8patil wrote:
If i use C# to make GUI and backend code in vc++

You should not be doing such a thing unless it is absolutely necessary.

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Help native C++ and .net

ThatsAlok5-May-09 23:26

ThatsAlok

5-May-09 23:26

Rajesh R Subramanian wrote:
ashish8patil wrote:
If i use C# to make GUI and backend code in vc++

You should not be doing such a thing unless it is absolutely necessary.

IMHO, I am doing this only Smile | :)

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Help native C++ and .net

KarstenK5-May-09 23:13

KarstenK

5-May-09 23:13

As others also wrote, the use of a MFC-GUI is the fastest and easiset way to get a nice GUI working with C++. Making a C#-GUI (and C++ Code) is an option with leeds to more works, and is only fine if you need some C#-Features.

Press F1 for help or google it.
Greetings from Germany

Re: Help native C++ and .net

ThatsAlok5-May-09 23:25

ThatsAlok

5-May-09 23:25

ashish8patil wrote:
If i use C# to make GUI and backend code in vc++.Is it possible.And Please tell good things and bad things if i use like that .and more from you

It wouldn't be wrong choice if you design your GUI in C# and use unmanaged coding at back hand.

Only question is, how you are integrating between two....?

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Help native C++ and .net

ashish8patil6-May-09 0:17

ashish8patil

6-May-09 0:17

.Net Com Ineroperability..?
can please tell me good way..?

Re: Help native C++ and .net

ThatsAlok6-May-09 1:16

ThatsAlok

6-May-09 1:16

you have flexibility of designing good gui using c#, which unmanaged vc++ doesn't provide you..

you one more way, if you know little bit of managed vc++, just write wrapper on your unmanged function using this.!

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
Support CRY- Child Relief and You

Re: Help native C++ and .net

ashish8patil6-May-09 3:14

ashish8patil

6-May-09 3:14

Sorry Alok Sir I not get you. And is there any way i can run my gui in c#.net and whole back-end code will run in c++ (means it will not use CLR when backend code will run). Thanks for your reply.

Re: Help native C++ and .net

ashish8patil6-May-09 19:03

ashish8patil

6-May-09 19:03

Hello Sir,
Can you please tell me what is diff between "pinvoke for win32.dll " and "com interop" .which one is better.

How to abort forcefully shutdown, reastart or logoff

Abhijit A5-May-09 20:14

Abhijit A

5-May-09 20:14

Hello friend,

I am working on financial application.
I am using VC++.net VS 2008.
I want to avoid shutdown/restart/logoff while my application is storing the user data, authorisation/authentification or file/fund transfer.
I want to abort shutdown,restart or logoff if any third application call ExitWindow, ExitWindoEx with the SX_FORCE or user run the command on command promt "shutdown -l".
I know one way by Windows notification WM_ENDSESSION and WM_QURYENDSESSION return FALSE,but this is not working in "FORCE shutdown" or "shutdown -l".
Please give me a suggestion.
Waiting for the positive reply.

Thank you.

abhi

Re: How to abort forcefully shutdown, reastart or logoff

«_Superman_»5-May-09 20:24

«_Superman_»

5-May-09 20:24

I don't think that would be possible or easily possible.
Anyway, how do you think you will stop "pull the plug"? Smile | :)

«_Superman_»
I love work. It gives me something to do between weekends.

Re: How to abort forcefully shutdown, reastart or logoff

Abhijit A5-May-09 21:01

Abhijit A

5-May-09 21:01

Thanks for the reply.

But I am not considering the case of CPU Power down or anybody plug off the power cable, UPS will take care these things.

But programaticaly if anybody trying forcefull shutdown or remote shutdown I want to delay the shutdown untill my application finish this work.

Another way I found AbortShutdown api but with this also i not able to get proper result or may be somewhere I am missing.

But If you have any idea to delay the shutdown, if anybody call ExitWindow with SW_FORCE please share it with me.

Thank you

abhi

Re: How to abort forcefully shutdown, reastart or logoff [modified]

enhzflep5-May-09 21:19

enhzflep

5-May-09 21:19

Oops!

I appear to have misread your post. If you want to _prevent_ somebody from shutting down windows, you'll need to hook ShutdownWindowsEx & SetSuspendState (or to be more precise, the kernel ZwShutDownWindows or NTShutDownWindows or something like that, I forget.

This will allow you to process any requests to shut down the box before the O/S does. Then all you have to do is return an error code every time, whilst never actually shutting down/standing by or hibernating the box.

You want to do basically what SetWindowsHookEx will do, except you want to do it with calls to the functions that power windows down, instead of to the messages that are between windows . I think you'll find what you're after if you search for function hooks.

This is the sort of thing you want: http://www.bigwebmaster.com/2068.html[^], just make sure you find one that's being given away - there should be no need to pay.

[EDIT]:
See here for the answer:

Cached google copy of 'prevent EWX_FORCE' forum post[^]

modified on Wednesday, May 6, 2009 3:34 AM

Re: How to abort forcefully shutdown, reastart or logoff

enhzflep5-May-09 21:04

enhzflep

5-May-09 21:04

bool shutDownWindows()
{
HANDLE hToken;
TOKEN_PRIVILEGES tkp;

// Get a token for this process.
if (!OpenProcessToken(GetCurrentProcess(),
        TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
    return false;

// Get the LUID for the shutdown privilege.
LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
        &tkp.Privileges[0].Luid);

tkp.PrivilegeCount = 1;  // one privilege to set
tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

// Get the shutdown privilege for this process.
AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
        (PTOKEN_PRIVILEGES)NULL, 0);

// Cannot test the return value of AdjustTokenPrivileges.
if (GetLastError() != ERROR_SUCCESS)
    return false;

// Shut down the system and force all applications to close.
if (!ExitWindowsEx(EWX_SHUTDOWN | EWX_FORCE, 0))
    return false;

    return true;
}


bool standbyWindows()
{
        HANDLE hToken;
        TOKEN_PRIVILEGES tkp;

        //  Get a token for this process.
        if (!OpenProcessToken(GetCurrentProcess(),
            TOKEN_ADJUST_PRIVILEGES | TOKEN_QUERY, &hToken))
        return false;

    // Get the LUID for the shutdown privilege.
        LookupPrivilegeValue(NULL, SE_SHUTDOWN_NAME,
        &tkp.Privileges[0].Luid);

        tkp.PrivilegeCount = 1;  // one privilege to set
        tkp.Privileges[0].Attributes = SE_PRIVILEGE_ENABLED;

// Get the shutdown privilege for this process.
        AdjustTokenPrivileges(hToken, FALSE, &tkp, 0,
            (PTOKEN_PRIVILEGES)NULL, 0);

// Cannot test the return value of AdjustTokenPrivileges.
        if (GetLastError() != ERROR_SUCCESS)
            return false;



        if (!SetSuspendState(false, false, false))
            return false;

        return true;
}

Re: How to abort forcefully shutdown, reastart or logoff

Abhijit A5-May-09 21:17

Abhijit A

5-May-09 21:17

Dear enhzflep,
Thanks for the reply.
But I want to avoid/prevent from the forcefull shutdown, not to make a shutdown.

Tahnk you,

abhi

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