ICustomQueryInterface Interface
Enables developers to provide a custom, managed implementation of the IUnknown::QueryInterface(REFIID riid, void **ppvObject) method.
Namespace: System.Runtime.InteropServices
Assembly: mscorlib (in mscorlib.dll)
The ICustomQueryInterface type exposes the following members.
This class permits advanced users to provide a customized managed implementation of the QueryInterface method.
Managed and native applications can use the customized implementation to return a specific interface for a specified interface ID, except for IID_IUnknown. That is, when QueryInterface is called, it will ignore custom implementations if its riid parameter is set to IID_IUnknown. However, you may still return IUnknown as the ppvObject.
Developers can provide custom implementations for all interfaces (except for IUnknown) if they define and implement a valid corresponding interface.
A valid user-defined interface has a v-table layout that matches the unmanaged COM interface exactly, and its InterfaceTypeAttribute is InterfaceIsIUnknown.
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
