What is the best way to autostart an action after OnShow event?

Question

I have a small application that most of the time have an action behind a Start-button that should be triggered from the commandline parameter /AUTORUN. If that parameter is

Answer 1

In the FormShow post yourself a message. In the message handler run your btnStart.

TfrmMainForm = class(TForm)
// snip
private
  procedure AutoStart(var Message: TMessage); message wm_user;
// snip
end

procedure TfrmMainForm.FormShow(Sender: TObject);
begin
  if FindCmdLineSwitch('AUTORUN') then
    PostMessage(Handle, wm_user, 0, 0);
end;

procedure TfrmMainForm.AutoStart(var Message: TMessage);
begin
  btnStart.Click;
end;