Как при создании объекта TThread передать ему некоторое значение

TYourThread = class(TTHread)
  private
    FFileName: string;
  protected
    procedure Execute; overrided;
  public
    constructor Create(CreateSuspennded: Boolean; const AFileName: string);
end;

...

constructor TYourThread.Create(CreateSuspennded: Boolean;
            const AFileName: string);
begin
  inherited Create(CreateSuspennded);
  FFIleName := AFileName;
end;

procedure TYourThread.Execute;
begin
  try
    ...
    if FFileName = ...
    ...
  except
    ...
  end;
end;

...

TYourForm = class(TForm)

...

private
  YourThread: TYourThread;
  procedure LaunchYourThread(const AFileName: string);
  procedure YourTreadTerminate(Sender: TObject);
  ...
end;

...

procedure TYourForm.LaunchYourThread(
          const AFileName: string);
begin
  YourThread := TYourThread.Create(True, AFileName);
  YourThread.Onterminate := YourTreadTerminate;
  YourThread.Resume
end;

...

procedure TYourForm.YourTreadTerminate(Sender: TObject);
begin
  ...
end;

...

end.