title: How to detect opened application with Ruby
body: <p>I'm making my first application using Ruby.
  The thing is that I open outlook using shell.ShellExecute('outlook.exe',...
  But I need to know if outllok is already open or not. (the script make an outlook instance everytime I call it... it's bad for me :p !)</p>
  
  <p>Second question. When I open an application with shellExecute, is it possible to minimise it after opening ? </p>
  
  <p>Thx ! </p>