procedure DoRootChanging(const NewRoot: IRoot); override;
virtual void __fastcall DoRootChanging(const Fmx::Types::_di_IRoot NewRoot);
For example, DoRootChanging is executed when this control is added to a form or moved from one form to another.
- Register this control to a specific form when the text control is added to the form.
- Unregister and register this control from one form to another when this control is moved between forms.