C / C++ / MFC

How to hook system API under windows 9x?

31-Oct-04 9:07

That is truly the stupidest thing I ever heard. If an OS is only for programmers, what programs will you write under it, and who will use them ? There's nothing so wrong with Windows ( or Linux for that matter ) that you and your team are likely to fix it. Your best bet would probably be to hack a linux distro to do what you and the 3 other people who will use it want from it.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

jedyking31-Oct-04 6:36

jedyking

31-Oct-04 6:36

I want to write a skinnable scrollbar, I need hook system scrollbar group API, how can I do that?

I can hook these API called from my process, bu if I process call comctl32.dll and comctl32.dll call these API, I can hook it? How can I hook these API called in comctl32.dll? any demo code will helpful.

User 665831-Oct-04 8:25

User 6658

31-Oct-04 8:25

http://www.codeproject.com/dll/apihijack.asp

I don't know if this works on 9x-based OS, though

modified 12-Sep-18 21:01pm.

jedyking1-Nov-04 5:28

jedyking

1-Nov-04 5:28

I want to hook COMCTL32.DLL's import function table or I want to replace the GetScrollBarInfo API 's enter address in user32.dll , because win98 share system DLL in the same address space and protect it, how can I do this??

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ThatsAlok31-Oct-04 17:29

ThatsAlok

31-Oct-04 17:29

there is very good example in system section for system wide Hooks including 9x.i think this may help

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

Re: TAPI givin link error

jedyking1-Nov-04 5:27

jedyking

1-Nov-04 5:27

TAPI givin link error

asif m@hmood31-Oct-04 5:46

asif m@hmood

31-Oct-04 5:46

i m developing a small telephony app usig TAPI. to intitialoze tapi i have to get ITTAPI ptr.
ITTAPI *gpTapi;
HRESULT res = CoInitialize(NULL);
CoCreateInstance(CLSID_TAPI,NULL,CLSCTX_INPROC_SERVER,IID_ITTAPI,(LPVOID *)&gpTapi);
gpTapi->Initialize();
i have added tapi3.h and also give link to Uuid.lib. At compile time it gives no error but at link time it gives error "unresolved symbol _CLSID_TAPI" and same error for "IID_ITTAPI". any one hav idea wats hapening. how can i find CLSID for TAPI and IID for ITTAPI. plz help

Michael P Butler31-Oct-04 6:18

Michael P Butler

31-Oct-04 6:18

TAPI FAQ[^]

Michael

CP Blog [^]

how to enable...

Natural_Demon31-Oct-04 4:19

passin a variable from another class

31-Oct-04 4:19

how to enable a system menu again from another class

this part works fine ...
void Cfirstw32mfcDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDHtmlDialog::OnSysCommand(nID, lParam);
}
if ((nID & 102) == IDS_ZONENAME)
{
CAddzonename* pDialog;
pDialog = NULL;
pDialog = new CAddzonename(this);

if(pDialog != NULL)
{
BOOL ret = pDialog->Create();
if (ret)
{
EDIT2 =("done");
UpdateData(FALSE);
CMenu* pSysMenu = GetSystemMenu(FALSE);
pSysMenu->EnableMenuItem(IDS_ZONENAME,MF_BYCOMMAND | MF_DISABLED | MF_GRAYED);
}
if(!ret) //Create failed.
AfxMessageBox("Error creating Dialog");
pDialog->ShowWindow(SW_SHOW);
}
else
AfxMessageBox("Error Creating Dialog Object");

//CAddzonename dlgAbout;
//dlgAbout.DoModal();
}
else
{
CDHtmlDialog::OnSysCommand(nID, lParam);
}
}

..........................................................
doesn't work, but doesn't return errors either
void CAddzonename::OnBnClickedOk()
{
/*Cfirstw32mfcDlg**/ CMenu* pSysMenu = GetSystemMenu(FALSE);
pSysMenu->EnableMenuItem(IDS_ZONENAME,MF_ENABLED);
DestroyWindow();
}

how do i enable the the menu item again, witch got disabled by pressing on it

kind regards,

marco

Natural_Demon31-Oct-04 4:13

31-Oct-04 4:13

HRESULT Cfirstw32mfcDlg::OnButtonOK(IHTMLElement* /*pElement*/)
{
UpdateData(TRUE);

if(( EDIT1 == "" )&&( EDIT2 == "" ))
{
AfxMessageBox("You must provide a username and a password or click Cancel",MB_ICONSTOP);
return NULL;
}

AfxGetApp()->WriteProfileString("Settings", "email", EDIT1);
AfxGetApp()->WriteProfileString("Settings", "password", EDIT2);

//CAddzonename* m_Zonename;
//LPCTSTR m_Zonename = m_Zonename;
/*
if(m_Zonename)
{
AfxGetApp()->WriteProfileString("Settings", "Zonename", m_Zonename);
}
*/
return 0;
}
.......................................................
// CAddzonename dialog header file

class CAddzonename : public CDialog
{
DECLARE_DYNAMIC(CAddzonename)

public:
// global variable
CString m_Zonename;
.......................................................

i have tried this this ...

CAddzonename* m_Zonename;
CString m_Zonename2 = m_Zonename;

if(m_Zonename2)
{
AfxGetApp()->WriteProfileString("Settings", "Zonename", m_Zonename2);
}

and return this ...

j:\Visual Studio Projects\win32\firstw32mfc2\firstw32mfcDlg.cpp(222) : error C2440: 'initializing' : cannot convert from 'CAddzonename *' to 'ATL::CStringT<basetype,stringtraits>'
with
[
BaseType=char,
StringTraits=StrTraitMFC<char>
]
No constructor could take the source type, or constructor overload resolution was ambiguous

what am i doing wrong?

kind regards,

marco

Christian Graus31-Oct-04 9:05

31-Oct-04 9:05

Natural_Demon wrote:
AfxGetApp()->WriteProfileString("Settings", "Zonename", m_Zonename2);

I'm assuming that your application overrides WriteProfileString to take a CAddzonename pointer. AfxGetApp will return an instance of the base class, you need to cast it to the specialised class that contains this method. as it stands, it's trying to call the base class method, as that's all it can see.

I think. It's kind of hard to wade through all of that badly formated code.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Natural_Demon31-Oct-04 10:10

31-Oct-04 10:10

//CAddzonename* m_Zonename; <-- seems to be good, but how to use it??
if(m_Zonename)
{
AfxGetApp()->WriteProfileString("Settings", "Zonename", m_Zonename);
}

returns ...
j:\Visual Studio Projects\win32\firstw32mfc2\firstw32mfcDlg.cpp(224) : error C2065: 'm_Zonename' : undeclared identifier

BTW, i tried that before

Bad = knowing 2 much

Christian Graus31-Oct-04 10:14

31-Oct-04 10:14

That's a whole different problem. m_Zonename does not exist in the class where you're trying to use it, obviously.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Natural_Demon31-Oct-04 10:16

31-Oct-04 10:16

how smart u are, i found that also out, but what do i need or can i do about it??

Bad = knowing 2 much

Christian Graus31-Oct-04 10:20

31-Oct-04 10:20

Natural_Demon wrote:
how smart u are, i found that also out, but what do i need or can i do about it??

If you're going to be sarcastic, you can get stuffed.

If you don't know how to declare or scope a variable, I suggest buying and reading C++ for dummies before asking questions here.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Natural_Demon31-Oct-04 10:41

31-Oct-04 10:41

i'm not getting sarcastic, but dont tell me it's obivious.
i'm trying to find out how, i'm already reading stuf the whoile weekend andf i have read about creating a global variable, but when i copy(adapting the code afcourse) the code, visual doesn't accept it.
somehow.

Bad = knowing 2 much

Christian Graus31-Oct-04 10:51

31-Oct-04 10:51

Global variables are bad design anyhow. However, in C++, to declare something as global ( that is, not within the scope of any class ), it will still only be visible in files where the file that declares it is included. I found the best way to do this is to declare stuff in stdafx.h. But a better option would be to declare it within the class that you're trying to get at with AfxGetApp(), although you still need to cast that, as I said before.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

Natural_Demon31-Oct-04 11:03

31-Oct-04 11:03

i tried to cast like this...
CAddzonename* m_Zonename;
//CString m_Zonename2 = m_Zonename;

and it returns this ...
j:\Visual Studio Projects\win32\firstw32mfc2\firstw32mfcDlg.cpp(222) : error C2440: 'initializing' : cannot convert from 'CAddzonename *' to 'ATL::CStringT<basetype,stringtraits>'
with
[
BaseType=char,
StringTraits=StrTraitMFC<char>
]
if i do this ...

CString m_Zonename2;
CAddzonename* m_Zonename;
m_Zonename2 = m_Zonename;

j:\Visual Studio Projects\win32\firstw32mfc2\firstw32mfcDlg.cpp(222) : error C2679: binary '=' : no operator found which takes a right-hand operand of type 'CAddzonename *' (or there is no acceptable conversion)
...................................................................

CAddzonename* m_Zonename;
//m_Zonename2 = m_Zonename;

//if(m_Zonename)
//{
AfxGetApp()->WriteProfileString("Settings", "Zonename", m_Zonename);
}

this will return ...
j:\Visual Studio Projects\win32\firstw32mfc2\firstw32mfcDlg.cpp(226) : error C2664: 'CWinApp::WriteProfileStringA' : cannot convert parameter 3 from 'CAddzonename *' to 'LPCTSTR'

Bad = knowing 2 much

Christian Graus31-Oct-04 11:41

31-Oct-04 11:41

Natural_Demon wrote:
CString m_Zonename2;
CAddzonename* m_Zonename;
m_Zonename2 = m_Zonename;

Duh. Why do you expect to convert a string from an instance of your class ?

Natural_Demon wrote:
this will return ...
j:\Visual Studio Projects\win32\firstw32mfc2\firstw32mfcDlg.cpp(226) : error C2664: 'CWinApp::WriteProfileStringA' : cannot convert parameter 3 from 'CAddzonename *' to 'LPCTSTR'

Bloody hell. Follow my advice, or stop asking me.

Christian

I have several lifelong friends that are New Yorkers but I have always gravitated toward the weirdo's. - Richard Stringer

html dialog

Natural_Demon31-Oct-04 3:56

31-Oct-04 3:56

hello, i have made a dialog with HTML and my question how to prevent if u press enter that the app closes itself.

HRESULT Cmfc2htmlDlg::OnButtonOK(IHTMLElement* /*pElement*/)
{
OnOK();
return S_OK;
}

HRESULT Cmfc2htmlDlg::OnButtonCancel(IHTMLElement* /*pElement*/)
{
OnCancel();
return S_OK;
}

what do i need to do, so it doesn't close if u press the enter bottun on your keyboard.

kind regards,

marco

Michael Dunn31-Oct-04 8:55

Michael Dunn

31-Oct-04 8:55

See the FAQ:

7.4 How do I prevent a dialog from closing when the user presses Enter or Esc?[^]

--
I'm Michael Dunn and I approve this post.

Vote Trogdor in oh-four!

Natural_Demon31-Oct-04 9:00

31-Oct-04 9:00

thnx, normaly i find anything on google, but i was lazy and i tried somany things

thank u

kind regards,

marco

Bad = knowing 2 much

faroqtam31-Oct-04 10:44

faroqtam

31-Oct-04 10:44

you can do this with many ways as follows:-
1- Yourclass::OnOk()
{
// make it empty
}
2- use SetwindowHookEx function to capture Keyboard keys
and u can compare the wpararm parameter in your callback function if it =13 then Enter key has been pressed and you
can do any thing you need.

after this if broblem is found contact me on faroq_tam2004@yahoo
to send to you some source code

faroq from yemen thammar
working in thammar universty and my intersted about network and security
im programmer from 6 years ago and ihave my B.C from this universty

Christian Graus31-Oct-04 12:44