| IContainsRibbonComponents | Used to extract all child components from RibbonItem objects |
| IContainsSelectableRibbonItems | Exposes GetItems, to indicate that the type contains a collection of RibbonItems |
| IDropDownRibbonItem | |
| IRibbonElement | Interface that every drawable ribbon element must implement |
| IRibbonForm | |
| IRibbonToolTip | |
| IScrollableRibbonItem | Implemented by Ribbon items that has scrollable content |
| RibbonButtonRibbonItemEventHandler | |
| RibbonButtonListRibbonItemEventHandler | |
| RibbonComboBoxRibbonItemEventHandler | |
| RibbonElementPopupEventHandler | |
| RibbonHostRibbonHostSizeModeHandledEventHandler |
| ProToolstripRendererButtonTextAlign | |
| ProToolstripRendererCorners | |
| RibbonArrowDirection | Represents the directions that arrows can have |
| RibbonButtonListListScrollType | |
| RibbonButtonStyle | |
| RibbonCaptionButtonCaptionButton | Defines the possible caption buttons |
| RibbonCheckBoxCheckBoxOrientationEnum | |
| RibbonCheckBoxCheckBoxStyle | |
| RibbonColorPart | |
| RibbonElementSizeMode | Represents the size modes that a RibbonElement can be |
| RibbonFormHelperNonClientHitTestResult | Possible results of a hit test on the non client area of a form |
| RibbonItemRibbonItemTextAlignment | |
| RibbonOrbStyle | |
| RibbonPanelFlowDirection | Represents possible flow directions of items on the panels |
| RibbonPopupManagerDismissReason | Specifies reasons why pop-ups can be dismissed |
| RibbonProfessionalRendererCorners | |
| RibbonTheme | |
| RibbonWindowMode | Possible modes for the ribbon to be placed on the window |