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IDispatch Methods

IDispatchEx is a subclass of IDispatch – therefore, any object that supports the IDispatchEx interface also has implementations of the IDispatch methods:

• IDispatch::GetTypeInfoCount
• IDispatch::GetTypeInfo
• IDispatch::GetIDsOfNames
• IDispatch::Invoke

These methods behave as defined by IDispatch except that they might provide additional support as defined by IDispatchEx. For example, IDispatchEx::Invoke should support the same values as IDispatchEX::InvokeEx (for example, DISPID_THIS, DISPATCH_CONSTRUCT). This allows an implementation of IDispatchEx::Invoke to simply delegate calls to IDispatchEx::InvokeEx. An object that supports both IDispatch and IDispatchEx might also choose to provide this additional support in IDispatch::Invoke.

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