and it works as intended, no alert is shown. This is the relevant generated code:
Create(parent, id, wxEmptyString, wxDefaultPosition, wxDefaultSize, wxDEFAULT_FRAME_STYLE, _T("id"));
BoxSizer1 = new wxBoxSizer(wxHORIZONTAL);
Panel1 = new wxPanel(this, ID_PANEL1, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL, _T("ID_PANEL1"));
BoxSizer2 = new wxBoxSizer(wxHORIZONTAL);
StaticText1 = new wxStaticText(Panel1, ID_STATICTEXT1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, _T("ID_STATICTEXT1"));
BoxSizer2->Add(StaticText1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
Button1 = new wxButton(Panel1, ID_BUTTON1, _("Label"), wxDefaultPosition, wxDefaultSize, 0, wxDefaultValidator, _T("ID_BUTTON1"));
BoxSizer2->Add(Button1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 5);
Panel1->SetSizer(BoxSizer2);
BoxSizer1->Add(Panel1, 1, wxALL|wxALIGN_CENTER_HORIZONTAL|wxALIGN_CENTER_VERTICAL, 0);
SetSizer(BoxSizer1);
MenuBar1 = new wxMenuBar();
Menu1 = new wxMenu();
MenuItem1 = new wxMenuItem(Menu1, idMenuQuit, _("Quit\tAlt-F4"), _("Quit the application"), wxITEM_NORMAL);
Menu1->Append(MenuItem1);
MenuBar1->Append(Menu1, _("&File"));
Menu2 = new wxMenu();
MenuItem2 = new wxMenuItem(Menu2, idMenuAbout, _("About\tF1"), _("Show info about this application"), wxITEM_NORMAL);
Menu2->Append(MenuItem2);
MenuBar1->Append(Menu2, _("Help"));
SetMenuBar(MenuBar1);
StatusBar1 = new wxStatusBar(this, ID_STATUSBAR1, 0, _T("ID_STATUSBAR1"));
int __wxStatusBarWidths_1[1] = { -1 };
int __wxStatusBarStyles_1[1] = { wxSB_NORMAL };
StatusBar1->SetFieldsCount(1,__wxStatusBarWidths_1);
StatusBar1->SetStatusStyles(1,__wxStatusBarStyles_1);
SetStatusBar(StatusBar1);
BoxSizer1->SetSizeHints(this);