public override Image GetGalleryButtonImage(PaletteRibbonGalleryButton button, PaletteState state) { switch(button) { default: case PaletteRibbonGalleryButton.Down: return _galleryButtonList.Images[0]; case PaletteRibbonGalleryButton.Up: return _galleryButtonList.Images[1]; case PaletteRibbonGalleryButton.DropDown: return _galleryButtonList.Images[2]; } }