ComInterfaceType Enumeration

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本文介绍了COM接口类型的三种主要形式：作为双接口暴露的InterfaceIsDual，它支持早期和晚期绑定；作为IUnknown派生接口的InterfaceIsIUnknown，仅支持早期绑定；以及作为dispinterface的InterfaceIsIDispatch，仅允许晚期绑定。

ComInterfaceType Enumeration

Identifies how to expose an interface to COM.

InterfaceIsDual	Indicates the interface is exposed to COM as a dual interface, which enables both early and late binding. InterfaceIsDual is the default value.
	InterfaceIsIUnknown	Indicates an interface is exposed to COM as an IUnknown -derived interface, which enables only early binding.
	InterfaceIsIDispatch	Indicates an interface is exposed to COM as a dispinterface, which enables late binding only.