Функция-член, как параметр функции

typedef void(*TVoidEvent)(void);
typedef void(__closure * TVoidVCLEvent)(void);
 
class TMyClass {
    const TVoidEvent m_EmptyEvent;
    const TVoidVCLEvent m_EmptyVCLEvent;
 
public:
    TMyClass(const TVoidEvent &AEmptyEvent, const TVoidVCLEvent &ASimpleVCLEvent) :
        m_EmptyEvent(AEmptyEvent),
        m_EmptyVCLEvent(ASimpleVCLEvent) {
    }
 
    void HandleEvent() {
        if (m_EmptyEvent) {
            m_EmptyEvent();
        }
        if (m_EmptyVCLEvent) {
            m_EmptyVCLEvent();
        }
    }
};
 
void GlobalFunction() {
    ShowMessage("Hello from global function!");
}
 
//---------------------------------------------------------------------------
void TForm1::EmptyFormEvent(void) {
    ShowMessage("Hello from public form function!");
}
 
//---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender) {
    TMyClass AMyClass(GlobalFunction,Form1->EmptyFormEvent);
    AMyClass.HandleEvent();
}
//---------------------------------------------------------------------------

TMyClass AMyClass(GlobalFunction,Form1->EmptyFormEvent());

TMyClass AMyClass(GlobalFunction, &EmptyFormEvent);

TMyClass AMyClass(GlobalFunction, EmptyFormEvent);

TMyClass AMyClass(GlobalFunction, &EmptyFormEvent);

void SetVCLEvent(const TVoidVCLEvent &ASimpleVCLEvent)
        {
              m_EmptyVCLEvent = ASimpleVCLEvent;
        }

AMyClass.SetVCLEvent(&EmptyFormEvent);

AMyClass.SetVCLEvent(EmptyFormEvent);

#include <boost/function.hpp>
#include <boost/bind.hpp>
 
// ---------------------------------------------------------------------------
void GlobalFunction() {
    ShowMessage("Hello from global function!");
}
 
// ---------------------------------------------------------------------------
void TForm1::EmptyFormEvent(void) {
    ShowMessage("Hello from public form function!");
}
 
// ---------------------------------------------------------------------------
class TMyClass {
    std::vector <boost::function < void() > > m_FunVec;
 
public:
    TMyClass() {
    }
 
    void AddHandler(const boost::function < void() > AHandler) {
        m_FunVec.push_back(AHandler);
    }
 
    void HandleEvent() {
        for (std::size_t i = 0; i < m_FunVec.size(); i++) {
            try {
                m_FunVec[i]();
            }
            catch(boost::bad_function_call & ex) {
                // function is not assigned or empty ptr
            }
        }
    }
};
 
// ---------------------------------------------------------------------------
void __fastcall TForm1::Button1Click(TObject *Sender) {
    TMyClass MyClass;
    MyClass.AddHandler(GlobalFunction);
    MyClass.AddHandler(boost::bind(&TForm1::EmptyFormEvent, Form1));
 
    MyClass.HandleEvent();
}