# Where are the interfaces implemented

**URL:** <https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566>\
**Category:** Windows\
**Created:** [March 10, 2022, 7:44am UTC](https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566 "2022-03-10T07:44:57Z")\
**Posts on this page:** 5\
**Page:** 1

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**Author:** ![MirDev](https://avatars.discourse-cdn.com/v4/letter/m/fbc32d/32.png) [@MirDev](https://devforum.zoom.us/u/MirDev)\
**Post date:** [March 10, 2022, 7:44am UTC](https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566/1 "2022-03-10T07:44:57Z")

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**Description**  
I’m trying to find the implementation of certain functions in the interfaces. I only saw the different interfaces and declaration of function but not the actual implementation.

**Which Windows Meeting SDK version?**  
v5.7.6.1081

**Device (please complete the following information):**

- Device:ASUS ROG Strix
- OS: Windows 10

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**Author:** ![jon.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/jon.zoom/32/13495_2.png) [@jon.zoom](https://devforum.zoom.us/u/jon.zoom)\
**Post date:** [March 10, 2022, 8:28pm UTC](https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566/2 "2022-03-10T20:28:39Z")

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Hi @MirDev,

Can you please elaborate on what information you are looking to find? Our Meeting SDK is not open source, so depending on what you’re looking for it may not be available.

Thanks!

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**Author:** ![MirDev](https://avatars.discourse-cdn.com/v4/letter/m/fbc32d/32.png) [@MirDev](https://devforum.zoom.us/u/MirDev)\
**Post date:** [March 24, 2022, 1:40pm UTC](https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566/3 "2022-03-24T13:40:54Z")

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Hello @jon.zoom,  
Could I possibly receive some kind of template?  
We’re trying to make a function that can notify the user that they have started speaking. We were looking at the Join Audio message box and thought we could implement a similar method. We just don’t understand what to write in our method and where to implement it so we wanted to see the Join Audio message box method and try to make our method based on that.

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**Author:** ![jon.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/jon.zoom/32/13495_2.png) [@jon.zoom](https://devforum.zoom.us/u/jon.zoom)\
**Post date:** [March 25, 2022, 4:48pm UTC](https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566/4 "2022-03-25T16:48:25Z")

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Hi @MirDev,

In order to determine when users’ audio has become active, you can utilize the [`onUserActiveAudioChange`](https://marketplacefront.zoom.us/sdk/meeting/windows/class_i_meeting_audio_ctrl_event.html#a220486be2d7fa30c6464e91b3754e114) callback. Before you can receive this callback, you would need to implement that interface and pass it into the [`SetEvent`](https://marketplacefront.zoom.us/sdk/meeting/windows/class_i_meeting_audio_controller.html#ad9dfa694b3e8c766c54002d686aeb1bc) function.

Thanks!

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**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [April 25, 2022, 2:49am UTC](https://devforum.zoom.us/t/where-are-the-interfaces-implemented/65566/5 "2022-04-25T02:49:09Z")

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Closed on April 25, 2022, 2:49am UTC

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