The GetItemFromOid method retrieves the item specified by a Windows Embedded CE object identifier (OID).
HRESULT GetItemFromOid( long oid, IDispatch ** ppolItem );
To ensure that your Calendar menu extension does not fail during the call to IPOutlookApp::GetItemFromOid, use IUnknown::AddRef and IUnknown::Release so your extension objects are not inadvertently freed by another process.
The function CePimCommand has been deprecated and is no longer used for creating Outlook Mobile menu add-ins. Use the function IContextMenu instead. For more information on adding menus and new menu options to existing context-sensitive shortcut menus, see Developing Menu Components.