working problem

[raj874]

i made one program in c for keyboard hooking but its not working i made first one dll and after made one exe which load dll it is sample code

/*THIS IS DLL CODE Replace "dll.h" with the name of your header */

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include "key.h"

HINSTANCE hinstance;
HHOOK hook;
LRESULT _declspec (dllexport)_stdcall KeyboardProc(int code,WPARAM wparam,LPARAM lparam)
{
if (code < 0)
{
return CallNextHookEx(hook,code,wparam,lparam);
}
if ((code == HC_ACTION)&&((wparam == WM_SYSKEYDOWN)||(wparam == WM_KEYDOWN)))
{
MessageBox(NULL,"TAB PRESS","WINDOWS",MB_OK);
}
return CallNextHookEx(hook,code,wparam,lparam);
}
BOOL _stdcall DllMain (HINSTANCE hInst /* Library instance handle. */ ,
DWORD reason /* Reason this function is being called. */ ,
LPVOID reserved /* Not used. */ )
{
hinstance = hInst;
return TRUE;
}
BOOL _declspec (dllexport) installhook()
{
hook = SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,hinstance,0);
}

and its header file key.h

#ifndef _DLL_H_
#define _DLL_H_

#if BUILDING_DLL
# define DLLIMPORT __declspec (dllexport)
#else /* Not BUILDING_DLL */
# define DLLIMPORT __declspec (dllimport)
#endif /* Not BUILDING_DLL */


DLLIMPORT BOOL installhook();



#endif /* _DLL_H_ */


and after it my exe code

#include<windows.h>
#include<stdio.h>

int WINAPI WinMain(HINSTANCE hinstance,HINSTANCE hprvinstance,LPSTR cmdt,int cmdl)
{
HINSTANCE h;
h = LoadLibrary("key.dll");
BOOL (*p)();
p = GetProcAddress(h,"installhook");
(*p)();
}

give me right direction thx i only want when i press key my messagebox displyed

thx

[VictorN]

give me right direction thx i only want when i press key my messagebox displyed

Did you debug your code?
Did LoadLibrary succeed or fail?
Did GetProcAddress succeed or fail?

[raj874]

Actully i didnt debug it but i checked it when i display the messagebox in installhook function in dll like it its works

BOOL _declspec (dllexport) installhook()
{
hook = SetWindowsHookEx(WH_KEYBOARD,(HOOKPROC)KeyboardProc,(HINSTANCE)hinstance,0);
MessageBox(NULL,"ITS WORKS","WINDOWS",MB_OK);
if (hook == NULL)
{
MessageBox(NULL,"HOOK NOT WORK","WINDOWS",MB_OK);
}

here i put one messagebox function and when i clicked on y exe that messagebox displayed mean getprocaddress works

[raj874]

and also loadlibrary works fine sorry for double post this small matter

[VictorN]

Then try to debug your dll code!

[raj874]

thx i solved problem

[VictorN]

thx i solved problem

Glad to know it!
And what was the reason?