IAccessibleWindowlessSite interface

A Microsoft ActiveX control site implements this interface to enable a windowless ActiveX control that has a Microsoft Active Accessibility implementation to express its accessibility. This interface enables the control container to reserve a range of object IDs that a windowless control can use to raise events, and enables the control container to provide an IAccessible pointer for the parent of the windowless control.

When to implement

A provider should implement this interface on any ActiveX control site that might host a windowless ActiveX control.

Members

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

• Methods

Methods

The IAccessibleWindowlessSite interface has these methods.

Remarks

The functions that manage object ID ranges expect the site object to maintain a list of ranges that have already been reserved. When the window that contains the ActiveX control receives a WM_GETOBJECT message with an LPARAM value (object ID) that is in a reserved range, the window should call the IAccessibleHandler::AccessibleObjectFromID method to get an IAccessible object for that object ID.

Requirements

See also

IRawElementProviderWindowlessSite