The IContextMenu2 interface is used to either create or merge a context menu associated with a certain object when a client of IContextMenu is supposed to handle messages associated with owner-drawn menu items.
When to Implement
Implement IContexMenu2 if your object is a client of IContextMenu when owner-drawn messages are an issue: Do so if it is possible to receive one of the following messages while calling TrackPopupMenu in the window procedure of the menu's owner window:
WM_INITPOPUP
WM_DRAWITEM
WM_MEASUREITEM
These messages are sent only if a QueryInterface call for an IContextMenu2 interface pointer is successful, indicating that the object supports this interface.
When to Use
You do not call this interface directly. IContextMenu2 is used by the operating system only when it has confirmed that the application is aware of this interface.
Methods in Vtable Order
| IUnknown Methods | Description |
| QueryInterface | Returns pointers to supported interfaces. |
| AddRef | Increments reference count. |
| Release | Decrements reference count. |
| IContextMenu2 Methods | Description |
| QueryContextMenu | Adds commands to a context menu. |
| HandleMenuMsg | Handles messages related to drawing owner-drawn menu items. |
| InvokeCommand | Carries out a menu command, either in response to user input or otherwise. For an example, see IExtractIcon. |
| GetCommandString | Retrieves the language-independent name of a menu command or the help text for a menu command. |