# No callback from lowerallhands function **URL:** \ **Category:** Windows\ **Created:** [August 3, 2021, 3:00am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120 "2021-08-03T03:00:31Z")\ **Posts on this page:** 12\ **Page:** 1
**Author:** ![aaronxu33](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/aaronxu33/32/29717_2.png) [@aaronxu33](https://devforum.zoom.us/u/aaronxu33)\ **Post date:** [August 3, 2021, 3:00am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/1 "2021-08-03T03:00:32Z")
**Description** There is no callback on onLowOrRaiseHandStatusChanged when runs IMeetingParticipantsController.LowerAllHands() **Which Windows Client SDK version?** zoom\_sdk\_demo 5.5.7681.0323\_x86 **To Reproduce(If applicable)** Steps to reproduce the behavior: 1. add callback code on onLowOrRaiseHandStatusChanged() 2. run demo app and join a meeting. 3. raise hand from demo app 4. lowerallhands from host 5. there is call back triggered on onLowOrRaiseHandStatusChanged **Screenshots** ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/9/e/9ef9f630cf1694b37a30bc02e094a3be5f80fc00.png) **Device (please complete the following information):** - Device: Lenovo Thinkpad S2 - OS: Windows 10 **Additional context** Add any other context about the problem here. ---
**Author:** ![liminal\_andy](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/liminal_andy/32/16222_2.png) [@liminal\_andy](https://devforum.zoom.us/u/liminal_andy)\ **Post date:** [August 3, 2021, 3:03pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/2 "2021-08-03T15:03:05Z")
Same issue in my app. Had to add a checker to the program loop, very inefficient ---
**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\ **Post date:** [August 4, 2021, 7:42pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/3 "2021-08-04T19:42:54Z")
Hey @aaronxu33, Thanks for using the dev forum! Are you receiving other callbacks successfully? Does this happen in the C++ SDK as well? Thanks! Michael ---
**Author:** ![aaronxu33](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/aaronxu33/32/29717_2.png) [@aaronxu33](https://devforum.zoom.us/u/aaronxu33)\ **Post date:** [August 5, 2021, 2:13am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/4 "2021-08-05T02:13:53Z")
Thanks for the reply. It runs well when someone raisehand or lowerhand. I didn’t try C++ , just found it on C# wrapper ---
**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\ **Post date:** [August 9, 2021, 7:35pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/5 "2021-08-09T19:35:59Z")
Hey @aaronxu33, Sorry if I am misunderstanding, is your issue now resolved? Thanks! Michael ---
**Author:** ![aaronxu33](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/aaronxu33/32/29717_2.png) [@aaronxu33](https://devforum.zoom.us/u/aaronxu33)\ **Post date:** [August 10, 2021, 1:40am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/6 "2021-08-10T01:40:45Z")
No, I mean it runs well when someone raisehand or lowerhand, but it doesn’t work when host LowerAllHands. ---
**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\ **Post date:** [August 10, 2021, 9:07pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/7 "2021-08-10T21:07:09Z")
Hey @aaronxu33, Can you try updating to the latest version? Thanks! Michael ---
**Author:** ![aaronxu33](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/aaronxu33/32/29717_2.png) [@aaronxu33](https://devforum.zoom.us/u/aaronxu33)\ **Post date:** [August 11, 2021, 1:02am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/8 "2021-08-11T01:02:58Z")
Hi Michael, I did try on zoom-c-sharp-wrapper-5.5.12511.0422. Same issue - there is no callback when lowerallhands. Aaron ---
**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\ **Post date:** [August 11, 2021, 6:31pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/9 "2021-08-11T18:31:22Z")
Hey @aaronxu33, I am seeing the same issue in the C++ SDK, will submit a bug report for this. Thanks! Michael ---
**Author:** ![aaronxu33](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/aaronxu33/32/29717_2.png) [@aaronxu33](https://devforum.zoom.us/u/aaronxu33)\ **Post date:** [August 12, 2021, 3:24am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/10 "2021-08-12T03:24:08Z")
Hi Michael, Thanks for the reply and confirmation of this issue. is there a schedule for this bug fixing? Aaron ---
**Author:** ![Michael\_Condon](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/michael_condon/32/13543_2.png) [@Michael\_Condon](https://devforum.zoom.us/u/Michael_Condon)\ **Post date:** [August 12, 2021, 6:38pm UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/11 "2021-08-12T18:38:41Z")
Hey @aaronxu33, We will try to have this in the version after next. No timeline quite yet. Thanks! Michael ---
**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:** [September 12, 2021, 4:39am UTC](https://devforum.zoom.us/t/no-callback-from-lowerallhands-function/55120/12 "2021-09-12T04:39:29Z")
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