| RadioButton | Mogul |
| RadioButtonClass | Mogul |
| RadioMenuItem | Mogul |
| RadioMenuItemClass | Mogul |
| Range | Mogul |
| RangeClass | Mogul |
| Rectangle |
| 1 (Type/Class) | Mogul |
| 2 (Data Constructor) | Mogul |
| Region |
| 1 (Type/Class) | Mogul |
| 2 (Data Constructor) | Mogul |
| ReliefHalf | Mogul |
| ReliefNone | Mogul |
| ReliefNormal | Mogul |
| ReliefStyle | Mogul |
| Renderer | Mogul, TreeList |
| Requisition |
| 1 (Type/Class) | Mogul |
| 2 (Data Constructor) | Mogul |
| ResponseAccept | Mogul |
| ResponseApply | Mogul |
| ResponseCancel | Mogul |
| ResponseClose | Mogul |
| ResponseDeleteEvent | Mogul |
| ResponseHelp | Mogul |
| ResponseId | Mogul |
| ResponseNo | Mogul |
| ResponseNone | Mogul |
| ResponseOk | Mogul |
| ResponseReject | Mogul |
| ResponseUser | Mogul |
| ResponseYes | Mogul |
| RgbDitherMax | Mogul |
| RgbDitherNone | Mogul |
| RgbDitherNormal | Mogul |
| radioButtonNewFromWidget | Mogul |
| radioButtonNewJoinGroupWithMnemonic | Mogul |
| radioButtonNewWithLabelFromWidget | Mogul |
| radioButtonNewWithMnemonic | Mogul |
| radioButtonNewWithMnemonicFromWidget | Mogul |
| radioMenuItemNewFromWidget | Mogul |
| radioMenuItemNewJoinGroupWithMnemonic | Mogul |
| radioMenuItemNewWithLabelFromWidget | Mogul |
| radioMenuItemNewWithMnemonic | Mogul |
| radioMenuItemNewWithMnemonicFromWidget | Mogul |
| rangeGetAdjustment | Mogul |
| rangeGetInverted | Mogul |
| rangeGetUpdatePolicy | Mogul |
| rangeGetValue | Mogul |
| rangeSetAdjustment | Mogul |
| rangeSetIncrements | Mogul |
| rangeSetInverted | Mogul |
| rangeSetRange | Mogul |
| rangeSetUpdatePolicy | Mogul |
| rangeSetValue | Mogul |
| regionCopy | Mogul |
| regionEmpty | Mogul |
| regionEqual | Mogul |
| regionGetClipbox | Mogul |
| regionGetRectangles | Mogul |
| regionIntersect | Mogul |
| regionNew | Mogul |
| regionOffset | Mogul |
| regionPointIn | Mogul |
| regionPolygon | Mogul |
| regionRectIn | Mogul |
| regionRectangle | Mogul |
| regionShrink | Mogul |
| regionSubtract | Mogul |
| regionUnion | Mogul |
| regionUnionWithRect | Mogul |
| regionXor | Mogul |
| release | Mogul |
