Responds before the first destructor executes.
procedure BeforeDestruction; virtual;
virtual __fastcall BeforeDestruction();
System::TObject::BeforeDestruction is called automatically before the object's first destructor executes. Do not call it explicitly in your applications.
The System::TObject::BeforeDestruction method implemented in System::TObject does nothing. Override this method when creating a class that takes some action before the object is destroyed. For example, TCustomForm overrides System::TObject::BeforeDestruction to generate an OnDestroy event.
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