And how can i add the strings from one stringList to the end of another?
How to Add Strings... use AddStrings()
You can guess many such functions by using the IDE's nice code browsing, code completion and hint features.
Type stringList and a dot (.), a list opens. Press 'a', select a func. Inside the parentesis do Ctrl-Shift-Space and you get a parameter list.
Ctrl-Click the function to go to its definition, press Ctrl-Up (or Ctrl-Down) for its implementation. The IDE is like a extension of your brain when used properly.
Juha