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h4c0r-BG
Master Cheater
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Joined: 29 Nov 2006
Posts: 449
Location: The yogurt country
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 Posted: Wed Mar 25, 2009 5:49 pm Post subject: [Delphi] SetWindowsHookEx InjectLIB |
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Well i started browsing the net for tutorials and found this web:
http://www.edgeofnowhere.cc/viewtopic.php?p=2483118
In there they explain a way to inject a dll via SetWindowsHookEx
So far so good, i started translating it from C++ to Delphi
Here is what i have:
| Code: | var
Form1: TForm1;
dllhandle:thandle;
implementation
{$R *.dfm}
function CBTProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): dword; stdcall;
begin
dllhandle:=LoadLibrary('C:\injected.dll');
result:=CallNextHookEx(0,nCode,WPARAM,LPARAM);
end;
procedure InjectDLL({dllname:pchar;}windowname:pchar);
var
cb_proc_offset,pid:dword;
begin
pointer(cb_proc_offset):=@CBTProc;
SetWindowsHookEx(WH_CBT,@cb_proc_offset,dllhandle,getwindowthreadprocessid(findwindow(nil,pchar(windowname)),@pid));
showmessage(inttohex(dllhandle,1));
end;
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Return value of dllhandle is 0 and no dll is injected at all, how can i fix that?
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Dark Byte
Site Admin
 Reputation: 471
Joined: 09 May 2003
Posts: 25813
Location: The netherlands
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| Posted: Wed Mar 25, 2009 7:10 pm Post subject: |
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Try re-reading the code examples.
first:
dllhandle:=LoadLibrary('C:\injected.dll'); should be in injectdll, not CBTProc
Also, instead of pointer(cb_proc_offset):=@CBTProc; just do:
SetWindowsHookEx(WH_CBT,@CBTProc, dllhandle,getwindowthreadprocessid(findwindow(nil,pchar(windowname)),@pid));
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oib111
I post too much
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Joined: 02 Apr 2007
Posts: 2947
Location: you wanna know why?
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| Posted: Wed Mar 25, 2009 7:10 pm Post subject: |
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This line of code:
| Code: |
dllhandle:=LoadLibrary('C:\injected.dll');
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Shouldn't be in the CBTProc function. Also, the CBTProc function is in your DLL, not your injector. Second off, the handle should be obtained in the InjectDLL function. Third, getwindowthreadprocessid returns the pid into a DWORD type variable, in this case pid, not as a return value. So you have to call it before you call SetWindowsHookEx and then use the variable pid as the last parameter.
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