How to do m_spPlayer->QueryInterface(&spSyncServices); on C#

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Artur H. Shamsutdinov - 21 Feb 2006 14:59 GMT

In Windows Media SDK Help to initialize IWMPSyncServices we using
m_spPlayer->QueryInterface(&spSyncServices);
But how can initialize IWMPSyncServices in C#. I tried to do in such way
IWMPSyncServices ss = (IWMPSyncServices)Player; but ss comes null.
How to do?

Thanks!

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Mattias Sjögren - 21 Feb 2006 22:32 GMT

>But how can initialize IWMPSyncServices in C#. I tried to do in such way
>IWMPSyncServices ss = (IWMPSyncServices)Player; but ss comes null.

Really? That should only give you null if Player is null. If the cast
fails you should get an exception.

Mattias

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Mattias Sjögren [C# MVP] mattias @ mvps.org
http://www.msjogren.net/dotnet/ | http://www.dotnetinterop.com
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Artur H. Shamsutdinov - 22 Feb 2006 11:08 GMT

> >But how can initialize IWMPSyncServices in C#. I tried to do in such way
> >IWMPSyncServices ss = (IWMPSyncServices)Player; but ss comes null.
>
> Really? That should only give you null if Player is null. If the cast
> fails you should get an exception.

I'm sorry - of course cast fails with exception.

> Mattias

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How to do m_spPlayer->QueryInterface(&spSyncServices); on C#

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