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ask_you wrote:
Secondly, from the task manager when i select my application and do end process, the application closes forcibly. Which event should i handle in these case so that my app does some clean-up operation which i would like to do on exit.
I'm half-surprised that when killing an application with the task manager it does not go thrue the exitinstance method !?!?!
maybe have a look at signal and handle SIGTERM
Maximilien Lincourt
Your Head A Splode - Strong Bad
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Did you see that he said "end the process"? There's two ways to stop an app in task manager, and he implies that he's using the "End Process" button on the Processes tab. When you do that, Task Manager displays a warning that this is a last-resort method for shutting an app down because it DOES NOT DO CLEANUP. His app is probably freezing up tighter than a 40-year-old virgin, forcing him to use End Process on it.
If the original poster was better at communication, this thread wouldn't be as long as it is, and he would at least be looking for the real problem instead of trying to hide it by trying to fudge in some clean-up code.
------- sig starts
"I've heard some drivers saying, 'We're going too fast here...'. If you're not here to race, go the hell home - don't come here and grumble about going too fast. Why don't you tie a kerosene rag around your ankles so the ants won't climb up and eat your candy ass..." - Dale Earnhardt
"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001
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Pls. help me on this one... Based on URLs, how will I be able to Get Installed BHOs?! Thanks in Advance!!! 
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wot are you looking for exactly?
Based on urls wot you want to get from a BHO ?
It's not a bug, it's an undocumented feature.
suhredayan@gmail.com
messenger :suhredayan@hotmail.com
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Im looking for the URL that Drops the ActiveX/BHO Installer...
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one way is to set "Internet option" security settings correctly.
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i just wanna know how to catch the URL that Drops the ActiveX/BHO Installer in Visual C++... hope that there is a Way...
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All the installed BHO's are registered under
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects, which will give you the COM guid which you can then link back to the registered COM object.
I'm not sure what you mean by 'Based on URLs'?
Michael
CP Blog [^]
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Hi.
I am in a project that needs to use a serial port to virtually set so that it acts as a virtual serial port for interfacing with many devices. In The market, there is software on it but that cost US$100++ per port which is too costly for my school project.
I seen codes in Windows CE using RegisterDevice but when i use in Visual C++ on desktop, it says undeclared even if i include <windows.h> and <winbase.h>
Any help will be greatlt appreciated.
Thank You
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Hi,
I've recently converted some C code into C++ but am now having problems with some of the memory allocation/deletion in it. The problem Im having is taht when I come to delete a float** I get an invalid heap error. I think I *may* be deleting the wrong bit of memory (not used pointers to pointers before). I've pasted the code fragment below and also the last few bits of the call stack where it crashes.
Can anyone spot what I'm doing wrong and also how I can fix it!
cheers,
void CTestprogDlg::OnButton1()
{
float **xMeas ;
// TODO: Add your control notification handler code here
xMeas = OpenMatrix ( 0,
1,
0,
0 ) ;
xMeas [0][0] = 1 ;
CloseMatrix ( xMeas,
0,
1,
0,
0 ) ;
}
float**
CTestprogDlg::
OpenMatrix ( long int nrl,
long int nrh,
long int ncl,
long int nch )
//allocate a float matrix with subscript range m[nrl..nrh][ncl..nch]
{
long int i ;
long int nrow = nrh - nrl + 1 ;
long int ncol = nch - ncl + 1 ;
float **m ;
/* allocate pointers to rows */
//m = (float **) malloc ( (size_t) ( ( nrow + NR_END ) * sizeof ( float*) ) ) ;
// TBD - changed to new instead of malloc
m = new float* [ nrow + NR_END ] ;
if ( !m )
{
AfxMessageBox ( "Matrix Allocation Error!!\n" ) ;
exit ( 1 ) ;
}
m += NR_END ;
m -= nrl ;
/* allocate rows and set pointers to them */
//m[nrl] = (float*) malloc ( (size_t) ( ( nrow * ncol + NR_END ) * sizeof ( float ) ) ) ;
// TBD - changed to new instead of malloc
m [nrl] = new float [ nrow * ncol + NR_END ] ;
if ( !m [nrl] )
{
AfxMessageBox ( "Matrix Allocation Error 2!!\n" ) ;
exit ( 1 ) ;
}
m [nrl] += NR_END ;
m [nrl] -= ncl ;
for ( i = nrl + 1 ; i <= nrh ; i++ )
{
m [i] = m [i - 1] + ncol ;
}
return ( m ) ;
}
void
CTestprogDlg::
CloseMatrix ( float **m,
long int nrl,
long int nrh,
long int ncl,
long int nch )
//free a float matrix opened with OpenMatrix
{
//free ( (char*) ( m [nrl] + ncl - NR_END ) ) ;
//free ( (char*) ( m + nrl - NR_END ) ) ;
// TBD - check that we want to delete all of v
// also check that this is deleting all of the object as it is a float**
long int nrow = nrh - nrl + 1 + NR_END ;
for ( int d1 = 0 ; d1 < nrow ; d1++ )
{
delete [] m [d1] ;
}
delete [] m ;
}
NTDLL! 77f9f9df()
NTDLL! 77fb4966()
NTDLL! 77f8b3d2()
KERNEL32! 77e944cd()
_CrtIsValidHeapPointer(const void * 0x011e766c) line 1697
_free_dbg_lk(void * 0x011e766c, int 1) line 1044 + 9 bytes
_free_dbg(void * 0x011e766c, int 1) line 1001 + 13 bytes
operator delete(void * 0x011e766c) line 351 + 12 bytes
CTestprogDlg::CloseMatrix(float * * 0x011e7624, long 0, long 1, long 0, long 0) line 176 + 21 bytes
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When you allocate memory using new, you are returned a pointer which is used as a reference in the delete call. In your allocation where you do
m = new flot*[size];
following this you do
m += NR_END
etc
This modifies you pointer address. You need to call delete on the same pointer that was given you by the new call.
As you are working with matrices, why not make use of a matrix class such as this one: Matrix class[^]
which handles automatic allocation and clean up and gives you access to all the regular operators for standard types too.
If you vote me down, my score will only get lower
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cheers Roger, I hadn't noticed that they where changing the pointer!
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Hai,
TCHAR szFileName [] = _T("D:\\NEW Images VC++\\IDB_BITMAP.bmp");
HBITMAP hBitmap = (HBITMAP)LoadImage( NULL,szFileName, 0, 0,SS_BITMAP,LR_DEFAULTSIZE | LR_LOADFROMFILE );
if(!hBitmap)
{
AfxMessageBox(_T("failed"));
}
m_CtrlPicture.SetBitmap(hBitmap);
LR_DEFAULTSIZE and LR_LOADFROMFILE are not supported in WinCE. Is there any other functions to load the bitmap.
Give your hands
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Hello!
I need to set the background color of all the controls on a dialog.
I have problems with a tab control.
Does someone know how to do it?
-Alma-
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i'm using visual c++6.0 to initialize the parallel port
i try to use the command of _outp and _inp so as to write and read the signal but i can't success
then i use inline aassembler to do it but it has errors again. i have tried for many times but i still can't success.
i think the main problem are in the lines below,
_asm out dx,al
_asm in al,dx
would anyone can help me?
the programme is as follows,
#include<conio.h>
#include<iostream.h>
#include<stdio.h>
#define PortAddress 0x378
short PortOut(unsigned int portadr,unsigned char data)
{
_asm mov edx, portadr
_asm mov al, data
_asm out dx,al //Loaded 'C:\WINNT\system32\ntdll.dll', no matching symbolic information found.
return(portadr,data);
}
unsigned char PortIn(unsigned int portadr)
{
unsigned char data;
_asm mov edx,portadr
_asm in al,dx
_asm mov data,al
return data;
}
int main(void)
{
short Dummy;
short PortData=0;
int pd=0;
cout<<"Input portdata\n";
cin>>pd;
Dummy=PortOut(PortAddress,pd);
PortData=PortIn(PortAddress);
cout<<"data at"<
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You're on the right lines with _inp() and _outp() but if you are using an "NT-based" OS (Win NT, 2000 or XP) you have to use a special driver to bypass the port security - by default you cannot directly access I/O ports.
There are a number of drivers available that do the same thing. UserPort is as good as any: http://www.embeddedtronics.com/public/Electronics/minidaq/userport/UserPort.zip
Hope that helps
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You can't do it using _inp and _outp, or even in assembler. Windows won't let you. You'll have to use the Windows functions for accessing parallel ports - look at CreateFile().
Ryan "Punctuality is only a virtue for those who aren't smart enough to think of good excuses for being late" John Nichol "Point Of Impact"
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Hi All,
I want to use a COM dll.
So I am first calling CoInitialize();
Then #import "Dll path" no_namespace
Then I am declaring the required inteface pointer and then calling CoCreateInstance();
But the compiler give me an error saying the interface is undelcared. But it generates the .tlh and .tli files in my debug directory of the project. And I think .tlh file conatains all definations. So ow what is wrong in my approach?
Do I need any .h file also in addition to .dll. 
Please reply early.
--------------
Vaibhav...
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Add the attribute "named_guids" to your #import directive.
Otherwise identifiers for interfaces and CLSID such as "IMyInterface" are undefined.
--
Roger
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Roger,
I did that...
#import "D:\Firewall Settings\IMP Files\hnetcfg.dll" no_namespace named_guids
still getting the same error..
--------------
Vaibhav...
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Five alternatives:
1. Verify that you are using IID_IMyInterface in the call to CoCreateInstance, or
2. you are using __uuidof( IMyInterface ) in the call to CoCreateInstance.
3. Check your spelling.
4. Search the .tlh file for the identifier that is undeclared and verify that it exists.
5. Do the import in stdafx.h to make the identifiers "globally" declared.
If this doesn't help I suggest you post some code showing how you are calling CoCreateInstance and the declarations of the identifiers you are trying to use from your imported library, i.e. snippets of the .tlh file.
--
Roger
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Hi Roger,
First of all sorry to reply late. I was very busy in a project.
Well, when I compile with #import "Dll path".. it creates a .tli and .tlh file in my debug directory. I checked those files by opening them in VS. None of them defines INetFwProfile interface. But I want to make use of INetFwProfile which as per microsoft is in the hnetcfg.dll which I am using with #import.
As far as code is concern it goes like this..
////////////////////////////////////////////////////////////////////// HRESULT hr = S_OK;
// Initialize COM.
hr = CoInitialize(NULL);
if (SUCCEEDED(hr))
{
hr = S_OK;
fwComInitialized = TRUE;
}
else
{
printf("CoInitialize failed: 0x%08lx\n", hr);
goto error;
}
INetFwProfile* fwProfile = NULL;
//////////////////////////////////////////////////////////////////////
Here I have not written Cocreateinstance() yet. Before that only its not complinig and last line give errors as mentioned below.
error C2065: 'INetFwProfile' : undeclared identifier
error C2065: 'fwProfile' : undeclared identifier
error C2106: '=' : left operand must be l-value
Does it mean hnetcfg.dll does not contain INetFwProfile. As far I know .dll contains only implementation and when you compile .tlh gets created with contains the declaration of the interface.
Do I have to include any .h also or have to give path of any other file in Include directories from Options in VC++ 6 compiler. I dont thinks so...
--------------
Vaibhav...
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Well...
The errors are expected since the interface is not declared.
I've tried to import hnetcfg.dll but there is no interface called INetFwProfile in my library either.
I browsed MSDN at the net and found the following link:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/ics/ics/inetfwprofile.asp[^]
The article tells me that WinXP SP2 is required, do you have it?
Furthermore the article says that the interface is declared in a header file called netfw.h, which I presume is shipped with VC7 which I don't have. I'm running VC6 and I can't find that header file.
The article doesn't say anything about hnetcfg.dll. Where did you get the information that the interface could be found in this library?
The bottom line is that you are looking for the interface in the wrong place. Or maybe you're looking at the right place but the library is an older version that doesn't contain the interface you're after.
Either way I cannot help you since I cannot find any information that confirms any of this.
--
Roger
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Roger,
Things are crystle clear now..
Go though this link http://blogs.tonygoodhew.com/xpsp2/archive/2004/05/19/269.aspx
In the third paragraph of this article it is said that either you can use dll by importing it or create .h and .tlb files using midl.exe. I prefered the formal over later. But the dll is not availbale with this PSDK. So I took the dll form a machine whre XP SP2 was installed.
But now I got the concept. That dll is just contains the core objects required to manipulate the firewall. But one requires Firewall manager also (which I thought would be in that dll only) which deals with that dll objects. Now this manager is defined in netfw.h. So later I went for the second approach and created netfw.h file from netfw.idl using midl.exe and used it in my project. Its working fine now.
As you said it required XP SP2. Ya but that is only for the client machine. i.e. the taget of the software must be a XP SP2. The developement machine could be any thing on which you have installed PSDK. I had already used the link you gave me for the reference in my project since that is only source for reference.
So the bottom line is either I couldn't get the exact meaning of the 3rd paragraph of the link I mentioned above or that link does not explain well.
Anyway, thank you for taking interest in my problem.
Have a nice day!
--------------
Vaibhav...
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Vaibhav Sanghavi wrote:
Then #import "Dll path" no_namespace
Then I am declaring the required inteface pointer and then calling CoCreateInstance();
I'm curious to know why you are using #import but not making use of the generated Smart Pointer interface.
I find it easier to use the smart pointers.
e.g
<br />
#import "craxdrt.tlb" no_namespace named_guids <br />
<br />
<br />
IApplicationPtr m_Application;<br />
<br />
HRESULT hr = m_Application.CreateInstance(__uuidof(Application));<br />
<br />
m_Application->OpenReport(reportName);<br />
<br />
Michael
CP Blog [^]
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