TCustomMemo = class(TCustomEdit)
class PASCALIMPLEMENTATION TCustomMemo : public TCustomEdit
TCustomMemo is the base type for memo components, which are multiline edit boxes, including TMemo and TDBMemo.
TCustomMemo introduces new properties and methods to expand the capabilities of TCustomEdit for handling multiline edit boxes.
Do not create instances of TCustomMemo. Use TCustomMemo as a base class when declaring control objects that implement a multiline edit control. Properties and methods of TCustomMemo provide basic behavior that descendant classes inherit as well as behavior that components can override to customize their behavior.