unit GetwindowthreadprocessidU;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  ProcessId: LongInt;   // holds the process identifier
begin
  {display the thread identifier}
  Label1.Caption:='Thread Id: '+IntToStr(GetWindowThreadProcessId(Form1.Handle,
                                                                  @ProcessId));

  {display the process identifier}
  Label2.Caption:='Process Id: '+IntToStr(ProcessId);
end;

end.