# ZOOM Windows SDK tagStartParam4APIUser Struct Reference

**URL:** <https://devforum.zoom.us/t/zoom-windows-sdk-tagstartparam4apiuser-struct-reference/5574>\
**Category:** Windows\
**Created:** [August 19, 2019, 5:40pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-tagstartparam4apiuser-struct-reference/5574 "2019-08-19T17:40:46Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![igor.lunarx](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/igor.lunarx/32/1354_2.png) [@igor.lunarx](https://devforum.zoom.us/u/igor.lunarx)\
**Post date:** [August 19, 2019, 5:40pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-tagstartparam4apiuser-struct-reference/5574/1 "2019-08-19T17:40:46Z")

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**Description**  
I’m using the C# Wrapper and I’m with some questions about the Start a meeting:

CZoomSDKeDotNetWrap.Instance.GetMeetingServiceWrap().Start(param)

But I’m having trouble with this object parameters:

```
    public struct StartParam4WithoutLogin
    {
        public string userID;
        public string userToken;
        public string userZAK;
        public string userName;
        public ZoomUserType zoomuserType;
        public ulong meetingNumber;
        public string vanityID;
        public HWNDDotNet hDirectShareAppWnd;
        public string participantId;
        public bool isDirectShareDesktop;
    }

```

I’m trying to understand where I can find these informations so an user can start a meeting and which one is really necessary.

**Which version?**  
Windows C# Wrapper

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**Author:** ![carson.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/carson.zoom/32/785_2.png) [@carson.zoom](https://devforum.zoom.us/u/carson.zoom)\
**Post date:** [August 19, 2019, 8:26pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-tagstartparam4apiuser-struct-reference/5574/2 "2019-08-19T20:26:27Z")

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Hi igor,

Thanks for the post. The C# wrapper is based on the Windows SDK so you may refer to the Windows SDK reference: [https://marketplace.zoom.us/docs/sdk/native-sdks/windows/sdk-reference](https://marketplace.zoom.us/docs/sdk/native-sdks/windows/sdk-reference)

Regarding your question, the following parameters are required:

- zoomuserType
- meetingNumber or vanityID
- userID
- userToken
- userZAK
- userName

The following parameters are optional, if not set, then it will go with their default values, please do set if any:

- participantId
- hDirectShareAppWnd
- isDirectShareDesktop
- isVideoOff
- isAudioOff

Hope this helps. Thanks!

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<div class="post-metadata">

**Author:** ![DeveloperBot](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/developerbot/32/12632_2.png) [@DeveloperBot](https://devforum.zoom.us/u/DeveloperBot)\
**Post date:** [August 21, 2020, 6:39pm UTC](https://devforum.zoom.us/t/zoom-windows-sdk-tagstartparam4apiuser-struct-reference/5574/3 "2020-08-21T18:39:31Z")

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Closed on August 21, 2020, 6:39pm UTC