coloquei   Button1MouseDown(TObject *Sender,
      TMouseButton Button, TShiftState Shift, int X, int Y);  o erro é   [C++ Error] Main.cpp(194): E2108 Improper use of typedef 'TObject' [C++ Error] Main.cpp(195): E2108 Improper use of typedef 'TMouseButton' [C++ Error] Main.cpp(195): E2121 Function call missing )