Component Automation
IDispatch Interface

The IDispatch interface exposes objects, methods and properties to programming tools and other applications that support Automation. COM components implement the IDispatch interface to enable access by Automation clients, such as Visual Basic.

For an example on how to access a COM object through the IDispatch interface, see Implementing the IDispatch Interface.

Methods

IUnknown Methods

Description

QueryInterface

Returns pointers to supported interfaces.

AddRef

Increments reference count.

Release

Decrements reference count.

IDispatch Methods

Description

IDispatch::GetTypeInfoCount

Retrieves the number of type information interfaces that an object provides (either 0 or 1).

IDispatch::GetTypeInfo

Gets the type information for an object.

IDispatch::GetIDsOfNames

Maps a single member and an optional set of argument names to a corresponding set of integer DISPIDs.

IDispatch::Invoke

Provides access to properties and methods exposed by an object.
Requirements

IDispatch is located in the Oleauto.h header file on 32-bit systems, and in Dispatch.h on 16-bit and Macintosh systems.

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Community Content

RaviSu
Check Wikipedia for a better explanation
See http://en.wikipedia.org/wiki/IDispatch for a nice description of IDispatch.
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