# Sample Windows SDK Zoom app does not build

**URL:** <https://devforum.zoom.us/t/sample-windows-sdk-zoom-app-does-not-build/137977>\
**Category:** Zoom Apps\
**Created:** [October 9, 2025, 3:39pm UTC](https://devforum.zoom.us/t/sample-windows-sdk-zoom-app-does-not-build/137977 "2025-10-09T15:39:54Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Justin13](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/justin13/32/73340_2.png) [@Justin13](https://devforum.zoom.us/u/Justin13)\
**Post date:** [October 9, 2025, 3:39pm UTC](https://devforum.zoom.us/t/sample-windows-sdk-zoom-app-does-not-build/137977/1 "2025-10-09T15:39:54Z")

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Version: v6.6.1.16446

Main error: “Cannot open include file: ‘UIlib.h’: No such file or directory”, the file does exist, and I’m using Visual Studio 2022. This is from a fresh download, and it just won’t compile.

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**Author:** ![chunsiong.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/chunsiong.zoom/32/35488_2.png) [@chunsiong.zoom](https://devforum.zoom.us/u/chunsiong.zoom)\
**Post date:** [October 14, 2025, 12:36pm UTC](https://devforum.zoom.us/t/sample-windows-sdk-zoom-app-does-not-build/137977/2 "2025-10-14T12:36:23Z")

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@Justin13 can you try changing the architecture to 64 bit or 32 bit according to what you are opening? and also change the configuration to release instead of debug

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<div class="post-metadata">

**Author:** ![Justin13](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/justin13/32/73340_2.png) [@Justin13](https://devforum.zoom.us/u/Justin13)\
**Post date:** [October 23, 2025, 1:27pm UTC](https://devforum.zoom.us/t/sample-windows-sdk-zoom-app-does-not-build/137977/4 "2025-10-23T13:27:52Z")

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Thank you! Changing from debug to release fixed it.