Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Logging System Messages

Posted on 2000-02-23
7
Medium Priority
?
228 Views
Last Modified: 2010-04-02
 I'm writing an app that logs to a txt file every click and key pressed by the user on the system.

  Any ideas how to achieve this? I've been doing some reading: SetWindowsHooksEx, GetMessage, PeekMessage, SubClassing, etc., but can't make it work.

  I'd appreciate source code if possible.

  Thanks in advance, Mq.

P.D.: Please be very explicit because I'm new in C++.
0
Comment
Question by:Maquiavelo
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 4
  • 3
7 Comments
 
LVL 4

Accepted Solution

by:
inpras earned 1212 total points
ID: 2554059
Hi
This is how U have to do it

Create a mfc dll add the following code or copy paste

void __stdcall InitiateMe(HWND hWnd, HINSTANCE hInstance);
HWND g_hWnd;
HHOOK g_hHookKeyboard;
HHOOK g_hHookMouse;
LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam);
BOOL SetMyKbMouseHook(HWND hWnd, HINSTANCE hInstance);
LRESULT CALLBACK MouseProc(int code, WPARAM wParam, LPARAM lParam) ;
CFile file("c:\\MyKBMSHook.txt", CFile::modeCreate|CFile::modeWrite);
void __stdcall InitiateMe(long lMyTime, long lpEnumFunc, HWND hWnd, HINSTANCE hInstance)
{
    vbFunc = (FUNCPTR)lpEnumFunc;
    glTimeMax = lMyTime;
    bMyFlag = FALSE;
    SetMyKbMouseHook(hWnd, hInstance)
}

BOOL SetMyKbMouseHook(HWND hWnd, HINSTANCE hInstance)
{
    g_hHookKeyboard = SetWindowsHookEx(WH_KEYBOARD, KeyboardProc, (HINSTANCE)NULL, GetCurrentThreadId());
    g_hHookMouse    = SetWindowsHookEx(WH_MOUSE, MouseProc, (HINSTANCE)NULL, GetCurrentThreadId());
    if(g_hHookKeyboard == FALSE)
    {
        return FALSE;
    }
    g_hWnd=hWnd;
    return TRUE;
}


LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam)
{
    if(code < 0 || code != HC_ACTION)
    {
        return CallNextHookEx(g_hHookKeyboard, code, wParam, lParam);
    }

    file.Write("KeyPressed", 10);
   
    return CallNextHookEx(g_hHookKeyboard, code, wParam, lParam);
}

LRESULT CALLBACK MouseProc(int code, WPARAM wParam, LPARAM lParam)
{
    if(code < 0 || code != HC_ACTION)
    {
        return CallNextHookEx(g_hHookMouse, code, wParam, lParam);
    }
    file.Write("MouseProc", 9);
    return CallNextHookEx(g_hHookMouse, code, wParam, lParam);
}

int CCallbackToVBApp::ExitInstance()
{
    file.Close();
    UnhookWindowsHookEx(g_hHookMouse);
    UnhookWindowsHookEx(g_hHookKeyboard);
    return CWinApp::ExitInstance();
}

Go to .def file add the function name in as
InitiateMe under section EXPORT

Call this function from an exe

Note if U want to log specific message then U have to handle in respective call back functions

Hope this helps
inpras
0
 
LVL 4

Expert Comment

by:inpras
ID: 2554074
the function declaration should be
void __stdcall InitiateMe(HWND hWnd, HINSTANCE hInstance)
{
            SetMyKbMouseHook(hWnd, hInstance)
}

I have passed hWnd and hInstance just in case U need them
this is system wide hook and all the messages will be logged with related to keyboard and mouse

inpras
0
 
LVL 1

Author Comment

by:Maquiavelo
ID: 2561529
Sorry for this question but I'm a VB guy. How do I test this MFC DLL??

I've never used Visual C++, tough I know some C++. So far as I've seen your answer is what I wanted, but I'd like to test it.. :)
0
Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

 
LVL 1

Author Comment

by:Maquiavelo
ID: 2563164
 When I tried to compile it this happened:

Compiling...
Error spawning cl.exe

SysHook.obj - 1 error(s), 0 warning(s)

----------------------------------------
And this when I tried to built it:

Compiling resources...
D:\Proyectos VB\MSG\SysHook\SysHook.rc(10) : fatal error RC1015: cannot open include file 'afxres.h'.
Error executing rc.exe.

SysHook.dll - 1 error(s), 0 warning(s)
0
 
LVL 4

Expert Comment

by:inpras
ID: 2563672
if U give me UR email ID I will send U code both VB and VC U can run them easily or U can contact me at inpras@hotmail.com by sending what U have done so that I will currect it and send U back
0
 
LVL 1

Author Comment

by:Maquiavelo
ID: 2566969
 Thanks again, my email is:

  fmesplet@infovia.com.ar
0
 
LVL 4

Expert Comment

by:inpras
ID: 2567550
I have sent the files
0

Featured Post

Industry Leaders: We Want Your Opinion!

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

What is C++ STL?: STL stands for Standard Template Library and is a part of standard C++ libraries. It contains many useful data structures (containers) and algorithms, which can spare you a lot of the time. Today we will look at the STL Vector. …
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
The viewer will learn additional member functions of the vector class. Specifically, the capacity and swap member functions will be introduced.
The viewer will be introduced to the member functions push_back and pop_back of the vector class. The video will teach the difference between the two as well as how to use each one along with its functionality.

670 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question