Re: How To debug a Running DLL - C / C++ / MFC Discussion Boards

Re: MFC :Property Sheet

ThatsAlok18-Dec-04 2:30

ThatsAlok

18-Dec-04 2:30

Miss Nazar,
if you know the ID of the EditBox you can use following api to retieve the value

1.GetDlgItemText<br />
 2.GetDlgItemInt

or I think you are using MFC , just add the variable to
the EditBox using MFC ClassWizard>>member variable,

and When ever you need the value just Call
UpdateData(TRUE); and you variable will
fill with value present in Editbox

-----------------------------
"I Think this Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: MFC :Property Sheet

missnazar18-Dec-04 2:56

missnazar

18-Dec-04 2:56

THankyou it worked!!

Modifying an external EXE's version resource

kenshin_x18-Dec-04 0:29

kenshin_x

18-Dec-04 0:29

How do I modify values (Comments, CompanyName, FileDescription, LegalCopyright, etc) in the StringFileInfo block of an external EXE resource?

Sample code would be greatly appreciated!

Re: Modifying an external EXE's version resource

Spiritofamerica18-Dec-04 13:39

Spiritofamerica

18-Dec-04 13:39

I don't have sources but there is no magical api that will do this(as far as I know) you havve to open the file and write to it replacing the info you want to replace with your info.

To know what to replace you need to lear about PE headers so you can find where the info is stored and overwrite it.

That's all I know on the subject,

hei, if you manage to do this send me the source to ok?

Re: Modifying an external EXE's version resource

kenshin_x19-Dec-04 16:13

kenshin_x

19-Dec-04 16:13

Hi Spiritofamerica. Thanks for the heads up on PE headers. I'll have to look into it. If I manage to find a solution. I'll make it available.

Re: Modifying an external EXE's version resource

David Crow20-Dec-04 8:39

David Crow

20-Dec-04 8:39

Just a guess, but have you tried using UpdateResource(..., RT_VERSION, ...)?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

How To debug a Running DLL

ThatsAlok17-Dec-04 23:54

ThatsAlok

17-Dec-04 23:54

I have Seen many people debuging there dll when they are running under context of some other application and they are able to set break point tooo.

i am too use to bebug with help of MessageBoxes(Yeah it Silly,but work for me ) but now it not working as i have to make a LSP Dll.so what i need to DEBUG any runnign DLL.

Hope somebody understand my Problem . PLEASSSSSSSSSeeeee

-----------------------------
"I Think this Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: How To debug a Running DLL

avenger_sb2518-Dec-04 1:13

avenger_sb25

18-Dec-04 1:13

Well , if you are using Visual Studio IDE,
Press F9 to set a breakpoint in the source file.

Then, Go to :

Project>>Settings>>Debug TAB

In the "Executable for debug session:" Edit box, BROWSE and select the EXE file that is going to use your dll.

THEN PRESS 'OK'

NOW RUN YOUR PROGRAM BY CLICKING THE '!' ICON OR ON THE TOOLBAR...or <ctrl+f5>. THIS WILL RUN THE EXE THAT YOU SELECTED EARLIER.
NOW IF THAT PROGRAM(EXE) MAKES USE OF AN EXPORTED FUNCTION FROM YOUR DLL, AND IF YOU HAVE SET UP YOUR BREAKPOINTS CORRECTLY, YOU CAN DEBUG YOUR DLL......

happy debugging!

...Avenger

Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs

Re: How To debug a Running DLL

ThatsAlok18-Dec-04 2:16

ThatsAlok

18-Dec-04 2:16

Thank You sir!

actually my problem is I am developing Layered Service Provider DLL(which will filter all the call make through the WINSOCK DLL)

now i don't know which exe is handlling the call or filtering Winsock request.

Now what i DO D'Oh! | :doh:

-----------------------------
"I Think this Will Help"
-----------------------------
Alok Gupta
visit me at http://www.thisisalok.tk

Re: How To debug a Running DLL

Renjith Ramachandran18-Dec-04 6:32

Renjith Ramachandran

18-Dec-04 6:32

put the exe file name in project>Settings>Debug (executable for debug section)

Ninety-eight percent of the thrill comes from knowing that the thing you designed works, and works almost the way you expected it would. If that happens, part of you is in that machine.

E_INVALIDARG with EnvDTE::Commands::AddNamedCommand

Franz Klein17-Dec-04 20:58

Franz Klein

17-Dec-04 20:58

I am always getting a return value of E_INVALIDARG when the function AddNamedCommand is called: Cry | :((

CComPtr<envdte::command> pCreatedCommand;

hr = pCommands->AddNamedCommand(m_pAddInInstance, CComBSTR(commandname), CComBSTR(commandtext), CComBSTR(tb_name), VARIANT_FALSE, IDB_LOGO, NULL, EnvDTE::vsCommandStatusSupported+EnvDTE::vsCommandStatusEnabled, &pCreatedCommand);

IDB_LOGO is a 16x16 Bitmap.

I am using Visual Studio .NET 2003 on Win XP SP2. I have looked at the documentation and at other examples but I can't find where I am going wrong.

Any ideas?

I am the handsome one in the crowd.

special folder

zpc_93017-Dec-04 19:05

zpc_930

17-Dec-04 19:05

Hi Anybody know the property of special folder (such as Downloaded Program Files,Offline Web Pages )which We can not paste folder and file in such folder?

CSliderCtrl Problem

Fayez El-Far17-Dec-04 15:47

Fayez El-Far

17-Dec-04 15:47

I have a slider bar that determines a position in a synchronization thread. The thread accesses tonnes of linked lists, and on-disk files. Whenever the user drags the slider bar I get exceptions because the updates to the thread are too fast. I need a way to determine when the dragging has stopped, so I can only update the thread with the final slider position.
URGENT HELP NEEDED!

Fayez

Re: CSliderCtrl Problem

Ravi Bhavnani17-Dec-04 16:43

Ravi Bhavnani

17-Dec-04 16:43

I think you need to handle the notification for TB_THUMBPOSITION instead of TB_THUMBTRACK. In the interests of user friendliness, you should also handle notifications for TB_PAGEDOWN, TB_PAGEUP, etc.

/ravi

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Re: CSliderCtrl Problem

Member 148659417-Dec-04 18:25

Member 1486594

17-Dec-04 18:25

I am currently using ON_WM_HSCROLL.
Can you direct me to the message handler functions for TB_THUMBPOSITION

Re: CSliderCtrl Problem

PJ Arends17-Dec-04 18:53

PJ Arends

17-Dec-04 18:53

SB_THUMBPOSITION is a possible value passed in the low word of the wParam parameter of the WM_HSCROLL message. In MFC it is the nSBCode parameter of the OnHScroll handler.

"You're obviously a superstar." - Christian Graus about me - 12 Feb '03

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Base pointer Blues!!!

avenger_sb2517-Dec-04 14:13

avenger_sb25

17-Dec-04 14:13

Suppose i have a set up like this:

class Base 
 { 
 public: 
   int x; 
   virtual void f() 
 };
class Derv:public Base
 {
 public:
   int y;
   void f();
};

void main()
{
	Base *p;
	p=new Derv[4];

       //I WANT TO ACCESS EACH ENTRY OF THE ALLOCATED ARRAY USING POINTER OF BASE
       for(int i=0;i<4;i++)
          (p+i)->y=10;  //THIS CRASHES WHEN i>0 AS I HAVE EXPLAINED BELOW
   
        delete[]p;
}

NOW HERE IS THE PROBLEM-
I can access the first element using pointer 'p' BUT if i try to acces the second element of the array by doing p+1, MY PROGRAM CRASHES...

This is the problem:
Suppose the derived class array was allocated at 0x00000000, then p contains 0x11111111. I thought that p+1 will be 0x11111111+sizeof(Derv), BUT it is 0x11111111+sizeof(Base)

SO WHAT I WANT TO KNOW FORM YOU FRIENDS IS - HOW TO ACCESS THE ELEMENTS OF A DERIVED CLASS ARRAY USING BASE CLASS POINTER ???

thanx for ur time

...Avenger

Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs

Re: Base pointer Blues!!!

Member 58088117-Dec-04 18:40

Member 580881

17-Dec-04 18:40

Hey Avenger,

Here's a funny workaround...

DWORD dw = (DWORD) p; // move in the array using this
Base* p2 = NULL;

for(int i=0;i<4;i++)
{
p2 = (Base*) dw;
p2->y=10;
dw += sizeof(Derv); // move to the next elem
}

What do you think??
Big Grin | :-D

Clinton

Re: Base pointer Blues!!!

avenger_sb2518-Dec-04 1:03

avenger_sb25

18-Dec-04 1:03

Nice trying Clinton! Big Grin | :-D

If you come up with a better solution, do let me know

chao! Rose | [Rose]

...Avenger

Remember... testing & debugging are always part of programming ...so exterminate those stinking bugs

Re: Base pointer Blues!!!

toxcct17-Dec-04 23:12

toxcct

17-Dec-04 23:12

hey, looking your code, i cannot see any inheritence between your two classes.

you must tell that Derv is derived from Base (public, protected or private as you like...) :

<font color=#0000FF>class </font>Base {
  <font color=#0000FF>public</font>:
    <font color=#0000FF>int </font>x;
    <font color=#0000FF>virtual void </font>f();
};

<font color=#0000FF>class </font>Derv : public Base {
  <font color=#0000FF>public</font>:
    <font color=#0000FF>int </font>y;
    <font color=#0000FF>void </font>f();
};

avenger_sb25 wrote:
Suppose the derived class array was allocated at 0x00000000

impossible, nothing can be allocated at the address 0x00000000 (and even the operating system don't !). you must test if the address returned by new is different from NULL ((void*)0x00000000) :

Base* p;
p = <font color=#0000FF>new </font>Derv[4];
<font color=#0000FF>if </font>(p != NULL) {
    <font color=#0000FF>for</font> (<font color=#0000FF>int </font>i = 0; i < 4; i++) {
        p[i]->y = 10;
    }
    <font color=#0000FF>delete</font>[] p;
}

TOXCCT >>> GEII power
[toxcct][VisualCalc]

this == 0x00000000

Gurra_Koo17-Dec-04 12:08

Gurra_Koo

17-Dec-04 12:08

Hi,

I'm debugging one of my mfc programms. I'm using a ON_COMMAND map thing to respond to a popup menu command...

When i´m debugging this function the debugger tells me that this is 0x00000000....
This cause a lot of trouble... And it seems that this is changing from time to time...
Sometimes it's a pointer to an array, sometimes something else...

I find this really wierd...

Re: this == 0x00000000

John R. Shaw17-Dec-04 13:04

John R. Shaw

17-Dec-04 13:04

Sounds like you are some how calling a class member function when the class no longer exist in memory. Which is the only time this should be NULL. Why it would ever be pointing to any thing else is anouther question.

INTP
"The more help VB provides VB programmers, the more miserable your life as a C++ programmer becomes."
Andrew W. Troelsen

Re: this == 0x00000000

17-Dec-04 18:32

I concur with John's statement.

As for your question of "pointing to something else", I've found the best solution is initialising every single pointer you use. It might seem a bit tedious with a "CMyClass* ptr = NULL;" line in every place, but at least it prevents debugging headaches! Cool | :cool:

Clinton

Re: this == 0x00000000

Gurra_Koo17-Dec-04 21:35

Gurra_Koo

17-Dec-04 21:35

It's just that the class member i'm calling does still exist in memory.
The function is a member of a CView-derrived class. And the view still exixsts!

And sometimes i can use the data members of the class in a proper way. And when i debug the code
this is changing!

Re: this == 0x00000000

Member 58088117-Dec-04 22:06

Member 580881

17-Dec-04 22:06

WOW!

That's some bug...

Hmm, lets see... if after this "change" occurs once and you cannot access your members properly thereafter, it could mean some copy function is playing foul and overwriting its buffer,...

but, if you can access your members correctly "now-and-then", well... all I can think of... is a pointer-to-view pointing to the wrong place...

Clinton

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