title: Insert text into the textbox of another application
body: <p>How do I, using C# or C++, insert text into the textbox of another application?
  I did this a long time ago and seemed to remember something about using the applications HWND. But since that change for every instance of the application I feel that I fon't remember the complete story. Do I somehow get a list of running apps, extract the one I want, get the HWND from that and then... hmm.... then what? :)</p>