| nID | Specifies the button command ID. |
| lpszText | Specifies the button text. |
| nSmallImageIndex | Zero-based index of button's image in the image list of small icons. |
| nLargeImageIndex | Zero-based index of the button's image in the list of large images. |
| imagesPalette | A reference to image list containing gallery images. |
| pImagesPaletteSimplified | A pointer to image list containing gallery images (displayed in the Ribbon simplified mode). |
| type | Specifies a ribbon element appearance in the Ribbon simplified mode. |
| bHideInFullMode | Specifies whether a ribbon element is invisible in the Ribbon classic (non-simplified) mode. |