Implementing an interface doesn't necessarily mean implementing all methods of that interface to do anything more than return E_NOTIMPL or S_OK as appropriate. The following table identifies the methods of the interfaces listed in the What Support for an Interface Means section that a control may implement in this manner. Check with the SDK OLE Reference documentation for full syntax and valid return values from these methods. Any method not listed here must be fully implemented if the interface is supported.
| Method | Comments |
|---|---|
| IOleControl | |
| GetControlInfo, OnMnemonic | Mandatory for controls with mnemonics. |
| OnAmbientPropertyChange | Mandatory for controls that use ambient properties. |
| FreezeEvents | See Event Freezing in the General Guidelines section. |
| IOleObject | |
| SetMoniker | Mandatory if the control is not marked with OLEMISC_CANTLINKINSIDE |
| GetMoniker | Mandatory if the control is not marked with OLEMISC_CANTLINKINSIDE |
| InitFromData | Optional |
| GetClipboardData | Optional |
| SetExtent | Mandatory only for DVASPECT_CONTENT |
| GetExtent | Mandatory only for DVASPECT_CONTENT |
| SetColorScheme | Optional |
| DoVerb | See Note 1. |
| IOleInPlaceObject | |
| ContextSensitiveHelp | Optional |
| ReactivateAndUndo | Optional |
| IOleInPlaceActiveObject | |
| ContextSensitiveHelp | Optional |
| IViewObject2 | |
| Freeze | Optional |
| Unfreeze | Optional |
| GetColorSet | Optional |
| IPersistStream[Init], IPersistMemory |
|
| GetSizeMax | See Note 2. |
| 1. A control with property pages must support IOleObject::DoVerbs for the OLEIVERB_PROPERTIES and OLEIVERB_PRIMARY verbs. A control that can be active must support IOleObject::DoVerbs for the OLEIVERB_INPLACEACTIVATE verb. A control that can be UI active must also support IOleObject::DoVerbs for the OLEIVERB_UIACTIVATE verb. | |
| 2. If a control supports IPersistStream[Init] and can return an accurate value, then it should do so. | |