Creating a DLL for system wide hooks

[Muzzery]

Can anybody tell me how to create a DLL file for a System Wide hook please?

I have no idea how it's done.

Thanks,

muzz

 

[bodhi]

[ul][li]First create a DLL with an exported function that is used as the hooking function.

__declspec(dllexport) LRESULT CALLBACK HookFunction(int code,WPARAM wParam,LPARAM lParam)
{ blah blah....
}[/li]

[li]Secondly install the system-wide hook. To install the hook, the DLL must be loaded, the hook function's address retrieved, and SetWindowsHookEx called with the function's address.

hHookDll = LoadLibrary("hook"
hHookProc = (HOOKPROC) GetProcAddress(hHookDll, "HookFunction"

// Install the hook to trap all keyboard messages
hSystemHook = SetWindowsHookEx(WM_xxxx,hHookProc,hHookDll,0);[/li]

[li]Finally, unhook and release when you are done

UnhookWindowsHookEx(hSystemHook);
FreeLibrary(hHookDll);[/li][/ul]

 

[Muzzery]

Thanks for the reply. I think i understand how to set the System-Wide hook, but you could you clarify what it is i have to do to write a DLL, and how to do it?

I have VB5 which i know i can use, but i have no idea how to write it.

Thanks

muzz