IOleWindow interface (oleidl.h)

The IOleWindow interface provides methods that allow an application to obtain the handle to the various windows that participate in in-place activation, and also to enter and exit context-sensitive help mode.


The IOleWindow interface inherits from the IUnknown interface. IOleWindow also has these types of members:


The IOleWindow interface has these methods.


Determines whether context-sensitive help mode should be entered during an in-place activation session.

Retrieves a handle to one of the windows participating in in-place activation (frame, document, parent, or in-place object window).


Several other in-place activation interfaces are derived from the IOleWindow interface. Containers and objects must implement and use these interfaces in order to support in-place activation. The following table briefly summarizes each of these interfaces.

Interface Description
IOleWindow The base interface. Implemented and used by containers and objects to obtain window handles and manage context-sensitive help. This interface is not supported for use across machine boundaries.
IOleInPlaceObject Implemented by objects and used by an object's immediate container to activate and deactivate the object.
IOleInPlaceActiveObject Implemented by objects and used by the top-level container to manipulate the object while it is active. Provides a direct channel of communication between an active object and its frame and document windows.
IOleInPlaceUIWindow Implemented by containers and used by objects to manipulate the container's document window.
IOleInPlaceFrame Implemented by containers and used by objects to control the container's frame window.
IOleInPlaceSite Implemented by containers and used by objects to interact with the in-place client site.
IOleInPlaceSiteEx Implemented by containers and called by objects to optimize activation and deactivation.
IOleInPlaceSiteWindowless Implemented by containers and called by windowless object to obtain services from its container.
IOleInPlaceObjectWindowless Implemented by windowless objects called by containers to support window message processing and drag and drop operations for windowless objects.

These interfaces can be arranged in three hierarchical levels with various interfaces implemented at each level. Calls that install user-interface menus commands and frame adornments, activate and switch between windows, and dispatch menu and keystrokes take place between the top-level container and the active object. Calls that support activating, deactivating, scrolling, or clipping span the containment hierarchy, with each level performing the correct actions.


Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header oleidl.h

See also