Delphi Dynamic method invocation

Your question is rather vague. Besides late-binding and scripting, it can mean using a method which name you do not know until runtime.

This falls in two categories, COM methods (using variant types) or Delphi methods being found and called using RTTI. Although RTTI has changed in the latest Delphi versions, I think that http://www.blong.com/Conferences/BorConUK98/DelphiRTTI/CB140.htm would apply to D2009