# IAuthService not return onAuthenticationReturn

**URL:** <https://devforum.zoom.us/t/iauthservice-not-return-onauthenticationreturn/48830>\
**Category:** Windows\
**Created:** [April 25, 2021, 3:25pm UTC](https://devforum.zoom.us/t/iauthservice-not-return-onauthenticationreturn/48830 "2021-04-25T15:25:26Z")\
**Posts on this page:** 1\
**Showing post:** 5

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**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:** [April 29, 2021, 6:47pm UTC](https://devforum.zoom.us/t/iauthservice-not-return-onauthenticationreturn/48830/5 "2021-04-29T18:47:28Z")

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Hey @yuril,

When creating a console application the windows message handling must be added in manually. Similar to this post: [joinSession Event callbacks are not fired - #11 by mtaha](https://devforum.zoom.us/t/joinsession-event-callbacks-are-not-fired/43426/11)

Thanks!  
Michael

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