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Firstly, the application that i developed closes forcibly when i press ENTER. which event should i handle so that the the application does respond to ENTER command.
My guess is that you are writing a dialog-based app and there's an OK button in it. The easy way to prevent the program from closing when you hit ENTER is to
1) change the ID of the OK button from IDOK to IDC_OK
2) Delete the OnOK handler from your code.
3) Add a new handler for IDC_OK.
Of course, there may be other ways to accomplish the same end, but I'm not really in a position to suggest anything more complex right now.
----------
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.
Handdle cleanup in the destructor of the dialog if possible. If you need to, you can also use the destructor for the app, or even OnExitInstance.
------- 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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1. i do not have any OK button in my application. so can any1 suggest how to handle the event on pressing the ENTER command..
2. i tried to enter clean-up in the destructor. it doesn't work I don't know about OnExitInstance. Can u elaborate?
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Well, you haven't even described your application, so how the hell can I (or anyone) help you?
WHY does your program close down when you press ENTER?
One final note - show us some freakin respect and SPELL everything out. You're not texting over a goddamn phone, so "any1" and "u" are not acceptable and only serve to annoy the literate members of this board.
------- 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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there is nothing much to speak out. its a dialog based app without any OK. The application minimizes to the tray when i click on the close. In the tray when it is minimized, i create a pop-up menu on right-clicking the icon. From this menu i exit.....
Now, my application closes on pressing ENTER. if i knew why it closes, i would not have posted a message in this forum. My intention was never to annoy literate members in this board...
ask_you
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Is it dialog based? Then you probably deleted the OK and CANCEL button of the resources?
Override the OnOK function (and leave it empty if it doesn't need to do something)
If it fails try also overriding the OnCancel function.
hope it helps.
"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix
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Thanx V.
I had removed the OK button from the dialog box.. but its implementation remained!!! I commented it. it worked... thanx
but my other question remains...
how to handle the event in my when someone does end process from the task manager.. Is it possible to handle??
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ask_you wrote:
I had removed the OK button from the dialog box.. but its implementation remained!!!
==> MICROSOFT 
ask_you wrote:
how to handle the event in my when someone does end process from the task manager.. Is it possible to handle??
Destructor/Dispose I think I wouldn't know. sorry.
"If I don't see you in this world, I'll see you in the next one... and don't be late." ~ Jimi Hendrix
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ask_you wrote:
1. i do not have any OK button in my application.
So is it a dialog-based application or not?
ask_you wrote:
2. i tried to enter clean-up in the destructor. it doesn't work
Which object's destructor?
ask_you wrote:
I don't know about OnExitInstance. Can u elaborate?
See here.
"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen
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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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