Tastaturhook 64bit von Delphi -> FPC (Lazarus)

[erich.wanker]

Hallo Leute,

ich hab eine 32bit DLL "Versatile.dll", um auf eine Eingabe vom Barcode-scanner (und F4) zu reagieren.
(Barcodescanner schickt als erstes "HardwareDevice4" als Ascii zur Indentifizierung)
Um das ganze auf einem 64bit Windows zu betreiben, hab ich mir jetzt Lazarus (v0.9.28.2 Beta) installiert -
und versuch grad, das ganze als "Versatile64.dll" zum laufen zu bringen Leider ohne Erfolg ..

Kann mir jemand sagen, was bei PHookRec1, AryChar, KeyHookFunc und DLLProc falsch ist?

Vielen Dank

Erich

Delphi-Quellcode:

library Versatile64;

{$mode objfpc}{$H+}

uses
 Classes,
 Windows,
 ActiveX,
 ShlObj,
 Messages,
 SysUtils;

type

  THookRec = record
    AppHnd: Integer;
    MemoHnd: Integer;
  end;
  PHookRec = ^THookRec;

var
  Hooked: Boolean;
  hKeyHook, hMemo, hMemFile, hApp: HWND;
  PHookRec1: PHookRec;




function KeyHookFunc(Code, VirtualKey, KeyStroke: Integer): LRESULT; stdcall;
var
  KeyState1: TKeyBoardState;
  AryChar: array[0..1] of Char;
  Count: Integer;
begin


  Result := 0;

  if Code = HC_NOREMOVE then Exit;
  Result := CallNextHookEx(hKeyHook, Code, VirtualKey, KeyStroke);
  if Code < 0 then  Exit;

  if Code = HC_ACTION then
  begin

    if ((KeyStroke and (1 shl 30)) <> 0) then
      if not IsWindow(hMemo) then
      begin
        hMemFile  := OpenFileMapping(FILE_MAP_WRITE, False, 'Versatile_mapping');
        PHookRec1 := MapViewOfFile(hMemFile, FILE_MAP_WRITE, 0, 0, 0);

        if PHookRec1 <> nil then
        begin
         hMemo := PHookRec1.MemoHnd;
         hApp  := PHookRec1.AppHnd;
        end;
      end;




    if ((KeyStroke and (1 shl 30)) <> 0) then
    begin
      GetKeyboardState(KeyState1);
      Count := ToAscii(VirtualKey, KeyStroke, KeyState1, AryChar, 0);

      if VirtualKey =  VK_F4 then
      begin
        PostMessage(hApp, WM_USER + 8765, 300 , 0);
      end;

      if Count = 1 then
      begin
         PostMessage(hApp, WM_USER + 8765, Ord(AryChar[0]), 0);
      end;
    end;
  end;

  // ........

end; // procedure




function StartHook(MemoHandle, AppHandle: HWND): Byte; export;
begin
  Result := 0;
  if Hooked then
  begin
    Result := 1;
    Exit;
  end;
  if not IsWindow(MemoHandle) then
  begin
    Result := 4;
    Exit;
  end;
  hKeyHook := SetWindowsHookEx(WH_KEYBOARD, KeyHookFunc, hInstance, 0);
  if hKeyHook > 0 then
  begin

    hMemFile := CreateFileMapping($FFFFFFFF, // $FFFFFFFF gets a page memory file
      nil,                // no security attributes
      PAGE_READWRITE,     // read/write access
      0,                  // size: high 32-bits
      SizeOf(THookRec),   // size: low 32-bits
      //SizeOf(Integer),
      'Versatile_mapping');    // name of map object
    PHookRec1 := MapViewOfFile(hMemFile, FILE_MAP_WRITE, 0, 0, 0);
    hMemo := MemoHandle;
    PHookRec1.MemoHnd := MemoHandle;
    hApp := AppHandle;
    PHookRec1.AppHnd := AppHandle;
    {set the Memo and App handles to the mapped file}
    Hooked := True;
  end
  else
    Result := 2;
end;



function StopHook: Boolean; export;
begin
  if PHookRec1 <> nil then
  begin
    UnmapViewOfFile(PHookRec1);
    CloseHandle(hMemFile);
    PHookRec1 := nil;
  end;
  if Hooked then
    Result := UnhookWindowsHookEx(hKeyHook)
  else
    Result := True;
  Hooked := False;
end;

procedure EntryProc(dwReason: DWORD);
begin
  if (dwReason = Dll_Process_Detach) then
  begin
    if PHookRec1 <> nil then
    begin
      UnmapViewOfFile(PHookRec1);
      CloseHandle(hMemFile);
    end;
    UnhookWindowsHookEx(hKeyHook);
  end;
end;

exports
  StartHook,
  StopHook;

begin
  PHookRec1 := nil;
  Hooked := False;
  hKeyHook := 0;
  hMemo := 0;
  DLLProc := @EntryProc;
  EntryProc(Dll_Process_Attach);
end.