General Discussion - Returning an array of objects from C# to COM/C++?

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Returning an array of objects from C# to COM/C++?

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Topic: Returning an array of objects from C# to COM/C++?

Posted By: znakeeye
Subject: Returning an array of objects from C# to COM/C++?
Date Posted: 19 April 2010 at 11:38am

I have written a COM component in C#. One of the interfaces contains a function that must return a list of objects of another exported interface:

[DispId(1)]

void GetList(ref MyClass[] list);

This is no rocket science as long as we stay in the world of .NET, but in MFC we find ourselves in hell:

void GetList(SAFEARRAY * * list)

{

static BYTE parms[] = VTS_UNKNOWN;

InvokeHelper(0x1, DISPATCH_METHOD, VT_EMPTY, NULL, parms, test);

}

Q1: Is this the preferred way of returning an array of objects from a COM object?

Q2: How do I instansiate the MyClass objects on the C++ side?

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