[C#]
    event TNotifyEvent OnOpen;
    delegate void TNotifyEvent(Object Sender);

[VB.NET]
    Event OnOpen As TNotifyEvent
    Delegate Sub TNotifyEvent(ByVal Sender As Object)

[Pascal]
    property OnOpen: TNotifyEvent;
    TNotifyEvent = procedure(Sender: TObject) of object;

[C++]
    void get_OnOpen(TNotifyEvent &pMethodOutResult, void * &pDataOutResult);
    void set_OnOpen(TNotifyEvent pMethodValue, void * pDataValue);
    typedef void (SB_CALLBACK *TNotifyEvent)(void * _ObjectData, TObjectHandle Sender);

[PHP]
    TNotifyEvent|callable|NULL get_OnOpen()
    void set_OnOpen(TNotifyEvent|callable|NULL $Value)
    callable TNotifyEvent(TObject $Sender)

[Java]
    TNotifyEvent getOnOpen();
    void setOnOpen(TNotifyEvent Value);
    TNotifyEvent.Callback OnOpen = new TNotifyEvent.Callback() {
        public void TNotifyEventCallback(TObject Sender) {
            //...
        }
    }