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unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs;

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure FormDestroy(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

var
  idHook: HHOOK;

{--------------------------------------------------------------------------------------------------}

function JournalRecordProc(nCode: Integer; wParam: WPARAM; lParam: LPARAM): LRESULT; stdcall;
begin

  if nCode = HC_ACTION then
    if lParam <> 0 then
      with PEventMsg(lParam)^ do
        if message = WM_MOUSEMOVE then
          Form1.Caption := IntToStr(paramL) + ' x ' + IntToStr(paramH);
  Result := CallNextHookEx(idHook, nCode, wParam, lParam);
  
end;

{--------------------------------------------------------------------------------------------------}

procedure TForm1.FormCreate(Sender: TObject);
begin

  idHook := SetWindowsHookEx(WH_JOURNALRECORD, @JournalRecordProc, HInstance, 0);
  
end;

{--------------------------------------------------------------------------------------------------}

procedure TForm1.FormDestroy(Sender: TObject);
begin

  if idHook <> 0 then
  begin
    UnhookWindowsHookEx(idHook);
    idHook := 0;
  end;

end;

{--------------------------------------------------------------------------------------------------}

end.