# Using UI properties on a background thread when screen sharing is started

**URL:** <https://devforum.zoom.us/t/using-ui-properties-on-a-background-thread-when-screen-sharing-is-started/64394>\
**Category:** macOS\
**Created:** [February 16, 2022, 10:24am UTC](https://devforum.zoom.us/t/using-ui-properties-on-a-background-thread-when-screen-sharing-is-started/64394 "2022-02-16T10:24:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![anton.yereshchenko](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/anton.yereshchenko/32/16916_2.png) [@anton.yereshchenko](https://devforum.zoom.us/u/anton.yereshchenko)\
**Post date:** [February 16, 2022, 10:24am UTC](https://devforum.zoom.us/t/using-ui-properties-on-a-background-thread-when-screen-sharing-is-started/64394/1 "2022-02-16T10:24:00Z")

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Hi,

If it’s possible could you tell few words about status of the [case](https://devforum.zoom.us/t/ui-api-called-on-a-background-thread-when-i-start-screen-sharing/), with using UI properties on a background threads, please?  
I am afraid that it could be lead to critical consequences, that will be impossible to handle on the client side.

Have you reproduced this case?  
If you need more information or additional steps feel free to ask me

Thank you,  
Anton.

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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:** [February 22, 2022, 9:53pm UTC](https://devforum.zoom.us/t/using-ui-properties-on-a-background-thread-when-screen-sharing-is-started/64394/2 "2022-02-22T21:53:24Z")

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Hi @anton.yereshchenko,

After looking into this, the operations being done are pretty minor and should not have any significant impact on usage of the SDK. This same implementation is present in the Zoom client in production, and there are no known issues related to this at the moment.

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:** [March 25, 2022, 7:54am UTC](https://devforum.zoom.us/t/using-ui-properties-on-a-background-thread-when-screen-sharing-is-started/64394/3 "2022-03-25T07:54:17Z")

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Closed on March 25, 2022, 7:54am UTC

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