# How can I highlight speaking?

**URL:** <https://devforum.zoom.us/t/how-can-i-highlight-speaking/67742>\
**Category:** Windows\
**Created:** [April 19, 2022, 11:14am UTC](https://devforum.zoom.us/t/how-can-i-highlight-speaking/67742 "2022-04-19T11:14:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Miyamoto](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/miyamoto/32/36997_2.png) [@Miyamoto](https://devforum.zoom.us/u/Miyamoto)\
**Post date:** [April 19, 2022, 11:14am UTC](https://devforum.zoom.us/t/how-can-i-highlight-speaking/67742/1 "2022-04-19T11:14:00Z")

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**Description**  
I’m using Custom UI. Is there any API which I can highlight speaking user? Or, should I use native win32 API?

**Which Windows Meeting SDK version?**  
v5.9.12625

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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:** [April 19, 2022, 10:10pm UTC](https://devforum.zoom.us/t/how-can-i-highlight-speaking/67742/2 "2022-04-19T22:10:51Z")

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Hi @Miyamoto, thanks for using our SDK.

You can determine when a user’s audio becomes active through the [`onUserActiveAudioChange`](https://marketplacefront.zoom.us/sdk/meeting/windows/class_i_meeting_audio_ctrl_event.html#a220486be2d7fa30c6464e91b3754e114) callback. The SDK does not provide the ability to auto highlight who is speaking in custom UI mode.

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:** [May 20, 2022, 8:11am UTC](https://devforum.zoom.us/t/how-can-i-highlight-speaking/67742/3 "2022-05-20T08:11:25Z")

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Closed on May 20, 2022, 8:11am UTC

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