, , , , ______________________1023

15.6 

OnChange    TCanvas

       
 TCanvas



typedef void ( closure *TNotifyEvent)(System::TObject* Sender);

_property Classes::TNotifyEvent OnChange



 OnChange      . 
      
:

1.   OnChanging.

2.    TCanvas    .

3.   OnChange.

  OnChange      -
,    .   ,   Font  ,
Brush    Pen       OnChange.

OnChange    TGraphicsObject__________________

     

 TGraphicsObject, TGraphic



typedef void (_closure *TNotifyEvent)(System::TObject* Sender);

_property Classes::TNotifyEvent OnChange



  OnChange    
        .

OnChanging________________________________________

.   OnChange.

OnClick

         -
 

 TControl



typedef void ( closure *TNotifyEvent)(System::TObject* Senders-
property Classes::TNotifyEvent OnClick