+ @remarks
+ While wxBitmapComboBox contains the wxComboBox API, but it might not actually
+ be derived from that class. In fact, if the platform does not have a native
+ implementation, wxBitmapComboBox will inherit from wxOwnerDrawnComboBox.
+ You can determine if the implementation is generic by checking whether
+ @c wxGENERIC_BITMAPCOMBOBOX is defined.
+