# Why Can´t I use any Helper Function?

**URL:** <https://devforum.zoom.us/t/why-can-t-i-use-any-helper-function/66786>\
**Category:** Video SDK\
**Created:** [March 31, 2022, 3:01pm UTC](https://devforum.zoom.us/t/why-can-t-i-use-any-helper-function/66786 "2022-03-31T15:01:19Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![kadu\_cemo](https://avatars.discourse-cdn.com/v4/letter/k/59ef9b/32.png) [@kadu\_cemo](https://devforum.zoom.us/u/kadu_cemo)\
**Post date:** [March 31, 2022, 3:01pm UTC](https://devforum.zoom.us/t/why-can-t-i-use-any-helper-function/66786/1 "2022-03-31T15:01:19Z")

</div>

Hi,

Maybe this issue is simple to solve… In my app, I can create a session that works fine… But when I try to use any helper function from the SDK, it seems not defined… As I´m missing some header file or dll… For example:

```auto
IZoomVideoSDKVideoHelper* vHelper = m_pVideoSDK->getVideoHelper();    
vHelper->getCameraList();

```

But the getCameraList() is not defined… Of course I´ve included the

```auto
#include <zoom_video_sdk_video_helper_interface.h>

```

But, still cannot use it… Am I missing something? Thank you!

---

<div class="post-metadata">

**Author:** ![kadu\_cemo](https://avatars.discourse-cdn.com/v4/letter/k/59ef9b/32.png) [@kadu\_cemo](https://devforum.zoom.us/u/kadu_cemo)\
**Post date:** [April 1, 2022, 5:55pm UTC](https://devforum.zoom.us/t/why-can-t-i-use-any-helper-function/66786/2 "2022-04-01T17:55:32Z")

</div>

Sorry about this…  
There was an error on the helpers path on my project…

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<div class="post-metadata">

**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 4, 2022, 6:08pm UTC](https://devforum.zoom.us/t/why-can-t-i-use-any-helper-function/66786/3 "2022-04-04T18:08:46Z")

</div>

That’s great to hear you were able to resolve this!

Please don’t hesitate to reach back out in a new topic with any additional questions. 🙂

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<div class="post-metadata">

**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 4, 2022, 6:08pm UTC](https://devforum.zoom.us/t/why-can-t-i-use-any-helper-function/66786/4 "2022-04-04T18:08:49Z")

</div>

Closed on April 4, 2022, 6:08pm UTC