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  ±è¿µ´ë(2003-03-07 20:04:00, Hit : 5787, Vote : 1729
 ¾î¶² ¾îÇø®ÄÉÀ̼ÇÀÌ ½ÃÀÛ µÇ´ÂÁö hookÀ¸·Î ¾Ë¾Æ³»±â

The hook is more like an interrupt..
I guess the variable txtfile is not available (out of DLL scope)
in the HookProc

Because it is not initialized in the HookProc (and only
in the EnableHook proc)  and the global DLL variable txtfie maybe
can't be reached while the hook is called

This is only a guess I can't test it at this place. But maybe it helps

You should try to define and it the file variable locally, and open and
close the file
at every write. like this :

library sysHook;
uses
  Windows, Messages, SysUtils;
var
  Hook : HHOOK;

function HookProc(nCode, wParam, lParam : integer) : LRESULT; stdcall;
var
  txtfile : text; // Shouldn't this be texfile in Delphi ? or at least in Delphi 2.0 and later ???
  Buf, FName : PChar;
  i : integer;
  hMod : THandle;
begin
  if (nCode = HSHELL_WINDOWCREATED) then
  begin
    Result := 1;
    buf := strAlloc(255);
    hMod := GetClassLong(wParam, GCL_HMODULE);
    GetModuleFileName(hMod,buf, 255);

    Assignfile(Txtfile, 'C:CREATE.TXT');
    Append(TxtFile);
    WriteLn(TxtFile,StrPas(buf)+' Opened1');
    flush (txtFile);
    close (txtfile);

    MessageBox(wParam, buf,buf,0);
    strDispose(buf);
    exit;
  end;
  Result := CallNextHookEx(0, nCode, wParam, lParam);
end;

procedure EnableHook; stdcall;
var
  txtfile : text;
begin
  Hook := SetWindowsHookEx(WH_SHELL, @HookProc, hInstance, 0);
  Assignfile(Txtfile, 'C:CREATE.TXT');
  Append(TxtFile);
  Writeln(TxtFile, 'Hook Installed');
  flush (txtfile);
  Close (txtfile);
end;

procedure DisableHook; stdcall;
var
  txtfile : text;
begin
  UnhookWindowsHookEx(Hook);
  Assignfile(Txtfile, 'C:CREATE.TXT');
  Append(TxtFile);
  Writeln(TxtFile, 'Hook Removed');
  flush (txtfile);
  CloseFile(TxtFile);
end;

exports
  EnableHook,
  DisableHook;
begin

end.





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