C / C++ / MFC Discussion Boards

Zdeslav Vojkovic2-Jan-06 23:07

2-Jan-06 23:07

what exactly do you mean by c++ modules? if you mean dll, you will have to use P/Invoke (import functions through DllImport attribute). if you mean COM libraries, you just have to add a reference to it, VisualStudio will use tlbimp.exe to create an RCW[^]

Re: How to use C++ modules in .Net.

ThatsAlok2-Jan-06 23:42

ThatsAlok

2-Jan-06 23:42

Sumit Kumar Khatri wrote:
I want to use them in C#.

COM/ATL is Key to success there buddy Smile | :)

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

userland hooks, some questions about this article

devvvy2-Jan-06 21:28

devvvy

2-Jan-06 21:28

I have some questions about userland hooks and this article Process-wide API spying - an ultimate hack by Anton Bassov.

QUESTION 1:
why "ProxyProlog" + "Prolog"? Why not just "Prolog" - ie. eliminate "ProxyProlog" and jump directly to "Prolog" intead?

QUESTION 2: The following code in DllMain of the injected Dll? Is there any place where we can download the source?

<br />
IMAGE_DOS_HEADER * <br />
dosheader=(IMAGE_DOS_HEADER *)hMod;<br />
<br />
IMAGE_OPTIONAL_HEADER * opthdr =<br />
  (IMAGE_OPTIONAL_HEADER *) ((BYTE*)hMod+dosheader->e_lfanew+24);<br />
<br />
IMAGE_IMPORT_DESCRIPTOR <br />
*descriptor=<br />
      (IMAGE_IMPORT_DESCRIPTOR *)(BYTE*) hMod +<br />
      opthdr->DataDirectory[ IMAGE_DIRECTORY_ENTRY_IMPORT]. <br />
VirtualAddress;<br />
<br />
while(descriptor ->FirstThunk)<br />
{<br />
    char*dllname=(char*)((BYTE*)hMod+ descriptor ->Name);<br />
<br />
    IMAGE_THUNK_DATA* thunk=( IMAGE_THUNK_DATA*)((BYTE*) hMod +<br />
                                 descriptor ->OriginalFirstThunk);<br />
<br />
    int x=0;<br />
    while(thunk->u1.Function)<br />
    {<br />
        char*functionname=(char*)((BYTE*) hMod +<br />
                ( DWORD)thunk->u1.AddressOfData+2);<br />
<br />
        DWORD *IATentryaddress=( DWORD *)((BYTE*) hMod +<br />
                descriptor->FirstThunk)+x;<br />
        x++; thunk++;<br />
    }<br />
<br />
    descriptor++;<br />
}<br />
<br />
struct RelocatedFunction{DWORD proxyptr;<br />
DWORD funtioncptr;char *dllname;char *functionname;};<br />
<br />
BYTE* ptr=(BYTE*)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,32);<br />
RelocatedFunction * reloc=(RelocatedFunction*)&ptr[6];<br />
DWORD addr=(DWORD)&ProxyProlog;<br />
reloc->proxyptr=addr;<br />
reloc->funcname= functionname;<br />
reloc->dllname=dllname;<br />
memmove (&reloc->functionptr, IATentryaddress,4);<br />
ptr[0]= 0xFF; ptr[1]= 0x15; memmove(&ptr[2],&reloc,4);<br />
DWORD byteswritten;<br />
WriteProcessMemory(GetCurrentProcess(),IATentryaddress,&ptr,4,&byteswritten);<br />

QUESTION 3:
What header do we need to include?

Thanks in advance. Thanks!

-- modified at 3:35 Tuesday 3rd January, 2006

Re: userland hooks, some questions about this article

Owner drawn2-Jan-06 21:41

Owner drawn

2-Jan-06 21:41

You can ask the question to the author himself.

You can find this place just below the article you are talking about, ie the end of the article.

Jesus Loves You and Me Smile | :)

<marquee direction="up" height="50" scrolldelay="1" step="1" scrollamount="1" style="background-color:'#44ccff'">
--Owner Drawn
--Nothing special
--Defeat is temporary but surrender is permanent
--Never say quits
--Jesus is Lord

yeah well. I did. No one is answering.

devvvy2-Jan-06 21:42

devvvy

2-Jan-06 21:42

Owner drawn wrote:
You can ask the question to the author himself.

You can find this place just below the article you are talking about, ie the end of the article

yeah well. I did. No one is answering.

What happens in my VC++ application

SeanQA2-Jan-06 20:54

SeanQA

2-Jan-06 20:54

I create a application Of MFC AppWizard(exe),its type is "Dialog Based".There is no error in compiling．But it present a assert bug when execute programme:
File: dlgdata.cpp
Line: 624
What happens in my application? Anyone who can help me.

Re: What happens in my VC++ application

Owner drawn2-Jan-06 21:01

Owner drawn

2-Jan-06 21:01

Try to stack trace in debug mode and find out from where did it originate or from which function in your app did it start. It will help you and us.

Jesus Loves You and Me Smile | :)

-- modified at 3:12 Tuesday 3rd January, 2006

Re: What happens in my VC++ application

Zdeslav Vojkovic2-Jan-06 23:11

Zdeslav Vojkovic

2-Jan-06 23:11

It seems that you are trying to call some data exchange function while control is not yet created (e.g. you can't do that for a control in dialogs constructor, because control is not yet created). could it be that you are calling UpdateData(TRUE) in dialogs constructor? if so, try to move that code to WM_INITDIALOG handler (OnInitDialog). however, this is just a wild guess without your code.

Re: What happens in my VC++ application

Michael Dunn3-Jan-06 8:01

Michael Dunn

3-Jan-06 8:01

See the FAQ
3.1 What does a failed debug assert mean?[^]

--Mike--
Visual C++ MVP Cool | :cool:

LINKS~! Ericahist | PimpFish | CP SearchBar v3.0 | C++ Forum FAQ
Pinky, are you pondering what I'm pondering?
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Implementation of Multipage PDF

Ramnath Panda2-Jan-06 20:31

Ramnath Panda

2-Jan-06 20:31

I want to implement a PDF Image file as multipage where each page consists of one image.Can you send the source code for the above.

Thanks & Regards
Ramnath

Ramnath Panda

Re: Implementation of Multipage PDF

khan++3-Jan-06 3:12

khan++

3-Jan-06 3:12

I think you will need to save your image files as TIFF files first, then they will be easy to concatenate, and then convert to PDF. LibTiff does that. Search for LibTiff and download it. It has various tools to concatenate tiffs, convert to pdf etc.

You did not mention to convert what format files to PDF. If they are tiff files, then half the work is done. If they are another format, then you could use CxImage (search for it on this site) to convert them to tiff first, then use LibTiff on them.

this is this.

facing prob with splitterwnd in CMainFrame of MDI app.

geeta_patil2-Jan-06 20:11

geeta_patil

2-Jan-06 20:11

hi all,
i want to split the MainFrame wnd of MDI app.i am able to split the CChilkdframe but CmainFrame in mDI app i am not..
i tried using OnCreateClient in Mainfrme.cpp but its giving assertion errors.

can anyone help me its very urgent..
thanks
Gets

Re: facing prob with splitterwnd in CMainFrame of MDI app.

Owner drawn2-Jan-06 20:18

Owner drawn

2-Jan-06 20:18

I don't think you can do that. You can only split MDI child windows not MDI parent window.

Hope I got your question right.

Jesus Loves You and Me Smile | :)

Re: facing prob with splitterwnd in CMainFrame of MDI app.

geeta_patil2-Jan-06 21:20

geeta_patil

2-Jan-06 21:20

Yup,
you gotmy question...
i wanted it to look something like Query Analyser of Sql Server..
means exploreer on left view and a document on the right side
can u throw some light on this

thanks
Geeta

Re: facing prob with splitterwnd in CMainFrame of MDI app.

Owner drawn2-Jan-06 21:22

Owner drawn

2-Jan-06 21:22

Why do you need an MDI for this.

Just a simple frame inherited from CFrameWnd.

Split it up and assign it different views in different panes.

You can have nested panes.

Take a look at IdFromRowCol function.

Jesus Loves You and Me Smile | :)

Re: facing prob with splitterwnd in CMainFrame of MDI app.

geeta_patil2-Jan-06 21:51

geeta_patil

2-Jan-06 21:51

u mean to say hve simple SDI app and split it up
and then assign diff views to it ..
ok i tried that..
how to kep the right pane empty.. i mean it should hve anything..especially that white colour background

thanks
Geta

Re: facing prob with splitterwnd in CMainFrame of MDI app.

Owner drawn2-Jan-06 22:15

Owner drawn

2-Jan-06 22:15

geeta_patil wrote:
how to kep the right pane empty

Just have an emtpy view.

Jesus Loves You and Me Smile | :)

Eytukan3-Jan-06 5:28

Eytukan

3-Jan-06 5:28

hey i'm noticing it now only. you have slimmed down like me!!~~[b]~~ now we both look similar with our color,weight and marquee!! cheers Beer | [beer]

"But your mind is very complex, very tricky. It makes simple things complicated. -- that's its work. And for centuries it has been trained for only one thing: to make things so complicated that your life becomes impossible."- Osho

<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[V]--

Re: OT

Owner drawn3-Jan-06 16:52

Owner drawn

3-Jan-06 16:52

T-1000 wrote:
you have slimmed down like me

Yeap. You've got it buddy.

This one's cool.

Big Grin | :-D

Jesus Loves You and Me Smile | :)

Custom drawn Tab controls

MrNed2-Jan-06 20:00

MrNed

2-Jan-06 20:00

Ive seen lots of examples of completely rewritten tab controls, but has anyone done what should be a relatively simple override of CTabCtrl::DrawItem and called the XP theme functions? I just want an XP looking tab control where I can change the text color of certain tabs, but cant get the drawing to look right Frown | :(

Re: Custom drawn Tab controls

Owner drawn2-Jan-06 21:38

Owner drawn

2-Jan-06 21:38

An option is...

HiglightItem(nTabNumber, TRUE); //To Turn on highlighting

HighlightItem(nTabNumber, FALSE); //To Turn off highlighting

Jesus Loves You and Me Smile | :)

VC++ /updation problem in mfc

harshandu2-Jan-06 19:38

harshandu

2-Jan-06 19:38

HI,

There are two classes A and B as follows

class A
{

public:

update_host(CString hostname);

}

class B
{

public:

get_hostname();
}

The get_hostname() gets the hosts name and then calls update_host as folows

A aobject;
aobject.update_host(CString hostname);

now this is what i do in update_host(CString hostname)

update_host(CString hostname)
{

m_hostname=hostname;
UpdateData(FALSE) //to update the value in the edit box.

}

now,when i execute it,i get the error saying

Debug assertion failed.
file:wincore.cpp
line:3095.

Please help in this regards.

Thank you.

HEllo

Re: VC++ /updation problem in mfc

ThatsAlok2-Jan-06 21:08

ThatsAlok

2-Jan-06 21:08

harshandu wrote:
UpdateData(FALSE) //to update the value in the edit box.

I am taking assumption that Class A is CDialog Drived Class, have you checked, that Dialog Box is Visible State at the time UpdateData() is called?

As if the dialog Box is not created before call of UpdateData, the dialog box application likly to crash.

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

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

Does Win32 console application supports WinMain and Winproc functions

chandu362-Jan-06 19:25

chandu36

2-Jan-06 19:25

Does Win32 console based application supports WinMain and WinProc

phani

-- modified at 1:27 Tuesday 3rd January, 2006

Re: Does Win32 console application supports WinMain and Winproc functions

kakan2-Jan-06 19:44

kakan

2-Jan-06 19:44

AFAIK, No.

The presence of WinMain and WinProc is what differentiates a Win32 app from a Win32 console app. A Win32 console app has got the main()-func.

Kakan

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