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System.ArgumentException

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Using The UnknownWrapper Class Part 2.

1. Introduction. 1.1 In┬ápart 1 of this series of articles, I demonstrated how to use the UnknownWrapper class to pass an IUnknown interface pointer from a COM-visible managed object to a COM method. 1.2 The COM method specifically takes a VARIANT parameter and the COM-visible managed object has to be contained inside a System.Object instance. … Continue reading