Big C++: Chptr. 27 -- Graphical User Interfaces

27.6 Layout Management

Each button has an ID, and the event table matches the ID with a function.

BEGIN_EVENT_TABLE(ButtonFrame, wxFrame)
   EVT_BUTTON(IS_SAY_HELLO, ButtonFrame::OnSayHello)
END_EVENT_TABLE()

When you construct a button, you specify the parent window, the button ID, and the button label.
```
wxButton* hello_button = new wxButton(this,
   IS_SAY_HELLO, "Say Hello");
```

The event handler has the same form as the menu event handler.

void ButtonFrame::OnSayHello(wxCommandEvent& event)
{
   text->AppendText("Hello, World!\n");
}