The IExchExtCallback interface enables extension objects to retrieve information about the current context, including the objects that are currently selected in the Microsoft Exchange window. IExchExtCallback uses the methods of the IUnknown interface for reference management.
IExchExtCallback is implemented by a callback object supplied by Microsoft Exchange. A pointer to this interface is passed as a parameter to many methods of the Microsoft Exchange extensibility API. This interface and any interfaces it might return are valid only for the time of the call to one of its methods and might not be retained when the extension object's method returns. The called method does not need to release the callback object unless it has completed a corresponding call to AddRef.
| Header file: | EXCHEXT.H |
| Exposed by: | Extension objects |
| Implemented by: | Microsoft Exchange |
| Called by: | Extension objects |
| Corresponding pointer type: | LPEXCHEXTCALLBACK |
| GetVersion | Returns the version number of the Microsoft Exchange application. |
| GetWindow | Returns a window handle corresponding to the specified flag. |
| GetMenu | Returns the Microsoft Exchange menu handle for the current window. |
| GetToolbar | Returns a toolbar's window handle. |
| GetSession | Returns an interface to the current open MAPI session and associated address book. |
| GetObject | Returns an interface and store for a particular object. |
| GetSelectionCount | Returns the number of objects selected in the window. |
| GetSelectionItem | Returns the entry identifier of a selected item in a Microsoft Exchange window. |
| GetMenuPos | Returns the position of a command or set of commands on the Microsoft Exchange menu. |
| GetSharedExtsDir | Returns the Microsoft Exchange shared-extensions directory. |
| GetRecipients | Returns a pointer to the recipient list of the currently selected item. |
| SetRecipients | Sets the recipient list for the currently selected item. |
| GetNewMessageSite | Returns interface pointers to the message site and view context of the selected message. |
| RegisterModeless | Enables extension objects that display modeless windows to coordinate with windows displayed by the Microsoft Exchange client. |
| ChooseFolder | Displays a dialog box that enables users to choose a specific message store and folder. |