Any unfinished property declarations are completed, and for any methods that require an implementation, empty methods are added to the implementation section.If you do not have class completion, you need to write the code yourself, completing property declarations and writing the methods.Given the example above, if you have class completion, read and write specifiers are added to your declaration, including any supporting fields or methods: If you have code completion, invoke it to finish the class declaration: place the cursor within a method definition in the interface section and press Ctrl+Shift+C (or right-click and select Complete Class at Cursor). Some editions of the IDE include a feature called class completion that simplifies the work of defining and implementing new classes by generating skeleton code for the class members you declare. TM圜lass = class For example: type TMyButton = class(TButton) You need to declare all the member variables, properties, methods, and events. In the type section, write the class declaration.Add the uses clause and type section to the interface section.In the IDE, start with a project open and choose File > New > Unit to create a new unit where you can define the new class.TObject defines only a handful of methods, including a basic constructor and destructor. If no parent class name is specified, the class inherits directly from TObject. The general syntax of a descendent class is as follows: You can also declare methods in the new class that override inherited ones, introducing new, more specialized behavior.

Each descendent class inherits the fields and methods of its parent and ancestor classes. The advantage of using classes comes from being able to create new classes as descendants of existing ones. The classes you write must descend from TObject or one of its descendants. Although there are many classes in the object hierarchy, you are likely to need to create additional classes if you are writing object-oriented programs.

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