void wxCheckBoxCallback (Widget w, XtPointer clientData,
                          XtPointer ptr);
 
-#if !USE_SHARED_LIBRARY
 IMPLEMENT_DYNAMIC_CLASS(wxCheckBox, wxControl)
 IMPLEMENT_DYNAMIC_CLASS(wxBitmapCheckBox, wxCheckBox)
-#endif
 
 // Single check box item
 bool wxCheckBox::Create(wxWindow *parent, wxWindowID id, const wxString& label,