Re: deleting a empty folder from a specified path - C / C++ / MFC Discussion Boards

Re: How to resize window automatic.

Hamid_RT8-Apr-08 7:22

Hamid_RT

8-Apr-08 7:22

It seems you need to SetWindowPos or MoveWindow on the WM_SIZE.

virtual BOOL PreTranslateMessage(MSG* pMsg);

TalSt6-Apr-08 21:15

TalSt

6-Apr-08 21:15

Hello,

I would like to stop all messages to the window taskbar. I try to use the PreTranslateMessage function and it seems that the messages to the taskbar are not sending throw this function. Do you know a way to catch the messages?
Do you know if it should be throw this function?

Thank a lot Wink | ;)

Re: virtual BOOL PreTranslateMessage(MSG* pMsg);

Nibu babu thomas6-Apr-08 21:35

Nibu babu thomas

6-Apr-08 21:35

TalSt wrote:
I would like to stop all messages to the window taskbar. I try to use the PreTranslateMessage function and it seems that the messages to the taskbar are not sending throw this function. Do you know a way to catch the messages?

Use GetWindowLong and GWL_WNDPROC to get a window's main procedure address and replace it with your own version using SetWindowLong.

Now messages to the window which you hooked should go via your WindowProc. Store replaced WindowProc ptr to use with CallWindowProc to do default stuff. Don't forget to replace back this ptr when your application exits!

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: virtual BOOL PreTranslateMessage(MSG* pMsg);

TalSt6-Apr-08 22:39

TalSt

6-Apr-08 22:39

Hello,

Can you give more details? I am not sure I understand...
How can the messages be stopped this way?

Thanks D'Oh! | :doh:

Re: virtual BOOL PreTranslateMessage(MSG* pMsg);

Nibu babu thomas6-Apr-08 22:51

Nibu babu thomas

6-Apr-08 22:51

TalSt wrote:

Can you give more details? I am not sure I understand...
How can the messages be stopped this way?

An easier option if you are using MFC is CWnd::SubclassWindow. Something more on XXXWindowLong is here -> http://www.google.co.in/search?q=GetWindowLong+GWL_WNDPROc&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a[^]

As you should be knowing that WindowProc is the main procedure through which a window receives messages, so hooking this procedure with your function will help you to filter messages.

Nibu thomas
Microsoft MVP for VC++

Code must be written to be read, not by the compiler, but by another human being.

Programming Blog: http://nibuthomas.wordpress.com

Re: virtual BOOL PreTranslateMessage(MSG* pMsg);

Stephen Hewitt7-Apr-08 15:31

Stephen Hewitt

7-Apr-08 15:31

I assume by "window taskbar" you mean the taskbar with the "Start" button on it. This is part of "Explorer.exe". You can't expect to recieve messages from windows in another process via "PreTranslateMessage"!

Steve

deleting a empty folder from a specified path

neha.agarwal276-Apr-08 20:58

neha.agarwal27

6-Apr-08 20:58

I want to delete a empty folder present at a specified path. I am using this code for doing this:-

<pre>
CString fol_Path = _T("C:\\Program Files\\New Folder");
if(_taccess(fol_Path, 0) != -1)
{
Attributes = GetFileAttributes(fol_Path);
if(Attributes != 0xFFFFFFFF)
{
SetFileAttributes(fol_Path,FILE_ATTRIBUTE_NORMAL);
_wunlink(fol_Path);
}
}
</pre>

but my _wunlink function is returning -1 value.....

i am using unicode.....

can anbody tel me how to do this.....

thanks in advance

Re: deleting a empty folder from a specified path

Michael Schubert6-Apr-08 21:42

Michael Schubert

6-Apr-08 21:42

You're using a rather bizarre mixture of Win32, tchar and _UNICODE functions. I assume you have checked elsewhere that the folder you want to delete is empty, right? Also, you don't have to use GetFileAttributes() since you want to delete the folder anyway.

Most importantly, check the return code from SetFileAttributes() with GetLastError().
If that is successful, use RemoveDirectory() and again check the return value with GetLastError().

how to use lineHold() to put a call on hold [modified]

sauravpratik926-Apr-08 20:33

sauravpratik92

6-Apr-08 20:33

good morning everybody,
I m very new to windows mobile..... i m using CeDialer application .... I m able to call outgoing call.... now i want to implement call hold.... the msdn says to use LinrHold().... but I dont know where to use it in my code ,,,, and which parameter to pass in it....
I m using visual studio 2005 and windows mobile 6 sdk....
Thanks a lot ...

modified on Monday, April 7, 2008 3:00 AM

how to run dll using Rundll32.exe [modified]

nitin36-Apr-08 20:18

nitin3

6-Apr-08 20:18

i have 2 exprted functions in a dll ( Win32 dynamiclink dll project )

void __stdcall MsgBox()
{
	MessageBox( NULL , "Hello" , "" , MB_OK ) ;
}
void __stdcall MsgBox1( LPSTR a )
{
	MessageBox( NULL , a , "" , MB_OK ) ;
}

//i tried following commands , the first one works but the not the secnd one, can any one tell where is the problem ?
//{
rundll32.exe mydll.dll,MsgBox
rundll32.exe mydll.dll,MsgBox1 "hi"
//}

//def file
//{
LIBRARY MyDll
EXPORTS

MsgBox
MsgBox1
//}

Thanks

modified on Monday, April 7, 2008 3:35 AM

Re: how to run dll using Rundll32.exe

CPallini6-Apr-08 21:32

CPallini

6-Apr-08 21:32

nitin3 wrote:
MessageBox( NULL , T , "" , MB_OK ) ;

And what is the output you're expecting from?

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

Re: how to run dll using Rundll32.exe

nitin36-Apr-08 21:48

nitin3

6-Apr-08 21:48

sorry that was a mistake, i modified the code.

my problem is the second function MsgBox1 function does not displays the text i entered,
or its shows a message "An exception occured while trying to run "mydllfile.dll"

Thanks & Regards

Re: how to run dll using Rundll32.exe

CPallini6-Apr-08 23:43

CPallini

6-Apr-08 23:43

To exploit the rundll32.exe your exported function must follow some rules, for instance the prototype must be like the following

void CALLBACK MsgBoxW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow);

then a working sample (at least, on XP it works...) will be

void CALLBACK MsgBoxW(HWND hwnd, HINSTANCE hinst, LPWSTR lpszCmdLine, int nCmdShow)
{
	MessageBox(hwnd, lpszCmdLine, L"MyMessageBox", MB_OK);
}

with def file

LIBRARY	"MyDLL"
EXPORTS
MsgBoxW @1

for a complete discussion see [^]
Smile | :)

Re: how to run dll using Rundll32.exe

ThatsAlok6-Apr-08 22:47

ThatsAlok

6-Apr-08 22:47

you have eyes of vulture.. Smile | :)

"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/codeProject$$>

check how much bytes are transsferred from port 21

chetanjoshi96-Apr-08 20:01

chetanjoshi9

6-Apr-08 20:01

Please let me know how much bytes transfferd by putfile() function.

Is there any api avilable?

calculate how much bytes transfferd by putfile() function

chetanjoshi96-Apr-08 19:59

chetanjoshi9

6-Apr-08 19:59

How to calculate how much bytes transfferd by putfile() function at any instant

Re: calculate how much bytes transfferd by putfile() function

ThatsAlok6-Apr-08 22:54

ThatsAlok

6-Apr-08 22:54

chetanjoshi9 wrote:
How to calculate how much bytes transfferd by putfile() function at any instant

you have to create system wide api hook on PutFile, please see if it could help :-

search following text in the CodeProject.com search box "system AND wide AND api AND hooking", you will find good number of article on above mentioned subject!

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

Check Internet speed

chetanjoshi96-Apr-08 19:58

chetanjoshi9

6-Apr-08 19:58

Please let me know how can I get the current internet speed in vc++

Is there any API available?

Re: Check Internet speed

ThatsAlok6-Apr-08 22:50

ThatsAlok

6-Apr-08 22:50

check if this could help! winnetstat[^]

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

CComMultiThreadModelNoCS

George_George6-Apr-08 19:53

George_George

6-Apr-08 19:53

Hello everyone,

I read the code for class CComMultiThreadModelNoCS of ATL. What means,

--------------------
(Section Threading Model Support, Chapter 3 Objects in ATL, ATL Internals)
CComMultiThreadModelNoCS is designed for multi-threaded objects the eschew object-level locking in favor of a more fine-grained scehme?
--------------------

My understanding is the object designed could use other approaches other than critical section, like mutex/event to do synchronization. Not sure whether my understanding is correct?

thanks in advance,
George

ATL bug of CComPtr?

George_George6-Apr-08 19:42

George_George

6-Apr-08 19:42

Hello everyone,

In the ATL Internals book, one form of constructor of CComQIPtr is implemented as this,

CComQIPtr (IUnknown* lp)
{
    p = NULL; if (lp != NULL) lp -> QueryInterface (*piid, (void**)&p);
}

I think there is a bug when QueryInterface fails, and the original value of member variable p is overwritten.

I found the in MSVC 2008, the implementation is,

atlcomcli.h

	CComQIPtr(_In_opt_ IUnknown* lp) throw()
	{
		if (lp != NULL)
			lp->QueryInterface(*piid, (void **)&p);
	}

Seems the bug is fixed? Is it a bug in old version of ATL or a bug in the book? Smile | :)

thanks in advance,
George

Re: ATL bug of CComPtr?

CPallini6-Apr-08 22:14

CPallini

6-Apr-08 22:14

George_George wrote:
I think there is a bug when QueryInterface fails

I see no bug.

George_George wrote:
and the original value of member variable p is overwritten.

The original variable? It's a constructor George!
When QueryInterface fails, having a null pointer, IMHO, is the expected behaviour.

George_George wrote:
Seems the bug is fixed? Is it a bug in old version of ATL or a bug in the book?

The essence of the behaviour doesn't change here.
Smile | :)

Re: ATL bug of CComPtr?

George_George6-Apr-08 22:26

George_George

6-Apr-08 22:26

Thanks CPallini,

CPallini wrote:
When QueryInterface fails, having a null pointer, IMHO, is the expected behaviour.

You mean when QueryInterface fails, QueryInterface will set the input parameter pointer to null?

regards,
George

Re: ATL bug of CComPtr?

CPallini6-Apr-08 23:09

CPallini

6-Apr-08 23:09

George_George wrote:
You mean when QueryInterface fails, QueryInterface will set the input parameter pointer to null?

Yes. You know that.
Smile | :)

Re: ATL bug of CComPtr?

George_George6-Apr-08 23:12

George_George

6-Apr-08 23:12

Thanks CPallini,

Question answered. I previously wrongly think it is assignment operator, other than constructor. Smile | :)

regards,
George

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