Registration-free COM client

[John via Digitalmars-d-learn]

On Wednesday, 29 June 2016 at 17:55:27 UTC, John wrote:
> On Wednesday, 29 June 2016 at 14:51:10 UTC, Thalamus wrote:
>>
>> and the D code (mostly unchanged from your example):
>>
>> interface ITestInterface
>> {
>>     int Identifier();
>> }
>
> ITestInterface needs to derive from IUnknown.

I realise that doesn't address your question, but the other thing 
is I'm pretty sure C# will transform the ITestInterface 
definition into something more like this:

   interface ITextInterface : IUnknown {
     HRESULT Identifier(int* result);
   }

And when it comes to calling it:

   int result;
   checkHR(instance.Indentifier(&result));