Zoom Meeting Sdk Windows

Zoom Meeting SDK (Windows)

Embed Zoom meeting capabilities into Windows desktop applications for native C++ integrations and headless bots.

New to Zoom SDK? Start Here!

The fastest way to master the SDK:

1. SDK Architecture Pattern - Learn the universal pattern that works for ALL 35+ features
2. Authentication Pattern - Get a working bot joining meetings
3. Windows Message Loop - Fix the #1 reason callbacks don't fire

Building a Custom UI?

• Custom UI Architecture - How SDK rendering actually works (child HWNDs, D3D, etc.)
• Custom UI Video Rendering Example - Complete working code
• SDK-Rendered vs Self-Rendered - Choose the right approach
• Custom UI Interface Methods - All 13 required virtual methods

Having issues?

• Build errors → Build Errors Guide
• Callbacks not firing → Windows Message Loop
• Quick diagnostics → Common Issues
• Performance / service quality → service-quality.md
• Deployment notes → deployment.md
• MSBuild from git bash → Build Errors Guide
• Complete navigation → SKILL.md

Prerequisites

• Zoom app with Meeting SDK credentials (Client ID & Secret)
• Visual Studio 2019/2022 or later
• Windows 10 or later
• C++ development environment
• vcpkg for dependency management

Need help with authentication? See the zoom-oauth skill for JWT token generation.

Project Preferences & Learnings

IMPORTANT: These are hard-won preferences from real project experience. Follow these when creating new projects.

Do NOT use CMake — Use native Visual Studio .vcxproj

Always create a native Visual Studio .sln + .vcxproj project, not a CMake project. Reasons:

• More standard and familiar for Windows C++ developers
• Developers can double-click the .sln to open in Visual Studio immediately
• Project settings (include dirs, lib dirs, preprocessor defines) are easier to see and edit in the VS Property Pages UI
• No extra CMake tooling or configuration step required
• Friendlier and easier for developers to understand and maintain

config.json must be visible in Solution Explorer

The config.json file (containing sdk_jwt, meeting_number, passcode) must be:

1. Included in the .vcxproj as a <None> item with <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
2. Placed in a "Config" filter in the .vcxproj.filters file so it appears under a "Config" folder in Solution Explorer
3. Easily editable by developers directly from Solution Explorer — they should never have to hunt for it in File Explorer

Example .vcxproj entry:

<ItemGroup>
  <None Include="config.json">
    <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
  </None>
</ItemGroup>

Example .vcxproj.filters entry:

<ItemGroup>
  <Filter Include="Config">
    <UniqueIdentifier>{GUID-HERE}</UniqueIdentifier>
  </Filter>
</ItemGroup>
<ItemGroup>
  <None Include="config.json">
    <Filter>Config</Filter>
  </None>
</ItemGroup>

Overview

The Windows SDK is a C++ native SDK designed for:

• Desktop applications - Native Windows apps with full UI control
• Headless bots - Join meetings without UI
• Raw media access - Capture/send audio/video streams
• Local recording - Record meetings locally or to cloud

Key Architectural Insight

The SDK follows a universal 3-step pattern for every feature:

1. Get controller (singleton): meetingService->Get[Feature]Controller()
2. Implement event listener: class MyListener : public I[Feature]Event { ... }
3. Register and use: controller->SetEvent(listener) then call methods

This works for ALL features: audio, video, chat, recording, participants, screen sharing, breakout rooms, webinars, Q&A, polling, whiteboard, and 20+ more!

Learn more: SDK Architecture Pattern Guide

Quick Start

1. Download Windows SDK

Download from Zoom Marketplace:

• Extract zoom-meeting-sdk-windows_x86_64-{version}.zip

2. Setup Project Structure

your-project/
  YourApp/
    SDK/
      x64/
        bin/          # DLL files and dependencies
        h/            # Header files
        lib/          # sdk.lib
      x86/
        bin/
        h/
        lib/
    YourApp.cpp
    YourApp.vcxproj
    config.json

Copy SDK files:

xcopy /E /I sdk-package\x64 your-project\YourApp\SDK\x64\
xcopy /E /I sdk-package\x86 your-project\YourApp\SDK\x86\

3. Install Dependencies (vcpkg)

# Install vcpkg
git clone https://github.com/Microsoft/vcpkg.git C:\vcpkg
cd C:\vcpkg
.\bootstrap-vcpkg.bat
.\vcpkg integrate install

# Install dependencies
.\vcpkg install jsoncpp:x64-windows
.\vcpkg install curl:x64-windows

4. Configure Visual Studio Project

Project Properties → C/C++ → General → Additional Include Directories:

$(SolutionDir)SDK\$(PlatformTarget)\h
C:\vcpkg\packages\jsoncpp_x64-windows\include
C:\vcpkg\packages\curl_x64-windows\include

Project Properties → Linker → General → Additional Library Directories:

$(SolutionDir)SDK\$(PlatformTarget)\lib

Project Properties → Linker → Input → Additional Dependencies:

sdk.lib

Post-Build Event (Copy DLLs to output):

xcopy /Y /D "$(SolutionDir)SDK\$(PlatformTarget)\bin\*.*" "$(OutDir)"

5. Configure Credentials

Create config.json:

{
  "sdk_jwt": "YOUR_JWT_TOKEN",
  "meeting_number": "1234567890",
  "passcode": "password123",
  "zak": ""
}

6. Build & Run

• Open solution in Visual Studio
• Select x64 or x86 configuration
• Press F5 to build and run

Core Workflow

┌─────────────┐    ┌─────────────┐    ┌─────────────┐    ┌─────────────┐
│  InitSDK    │───►│  AuthSDK    │───►│ JoinMeeting │───►│ Raw Data    │
│             │    │  (JWT)      │    │             │    │ Subscribe   │
└─────────────┘    └─────────────┘    └─────────────┘    └─────────────┘
                         │                   │
                         ▼                   ▼
                   OnAuthComplete      onInMeeting
                     callback           callback

⚠️ CRITICAL: Add Windows message loop or callbacks won't fire!

while (!done) {
    MSG msg;
    while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    std::this_thread::sleep_for(std::chrono::milliseconds(100));
}

See: Windows Message Loop Guide

Code Examples

💡 Pro Tip: These are minimal examples. For complete, tested code see:

• Authentication Pattern - Full auth workflow
• Raw Video Capture - Complete video capture
• SDK Architecture Pattern - Implement any feature

Important: Include Order

CRITICAL: Include headers in this exact order or you'll get build errors:

#include <windows.h>      // MUST be first
#include <cstdint>         // MUST be second (SDK headers use uint32_t)
// ... other standard headers ...
#include <zoom_sdk.h>
#include <meeting_service_components/meeting_audio_interface.h>  // BEFORE participants!
#include <meeting_service_components/meeting_participants_ctrl_interface.h>

See: Build Errors Guide for all dependency fixes.

1. Initialize SDK

#include <windows.h>
#include <cstdint>
#include <zoom_sdk.h>

using namespace ZOOM_SDK_NAMESPACE;

bool InitMeetingSDK() {
    InitParam initParam;
    initParam.strWebDomain = L"https://zoom.us";
    initParam.strSupportUrl = L"https://zoom.us";
    initParam.emLanguageID = LANGUAGE_English;
    initParam.enableLogByDefault = true;
    initParam.enableGenerateDump = true;

    SDKError err = InitSDK(initParam);
    if (err != SDKERR_SUCCESS) {
        std::wcout << L"InitSDK failed: " << err << std::endl;
        return false;
    }
    return true;
}

2. Authenticate with JWT

#include <windows.h>
#include <cstdint>
#include <auth_service_interface.h>
#include "AuthServiceEventListener.h"

IAuthService* authService = nullptr;

void OnAuthenticationComplete() {
    std::cout << "Authentication successful!" << std::endl;
    JoinMeeting();  // Proceed to join meeting
}

bool AuthenticateSDK(const std::wstring& jwtToken) {
    CreateAuthService(&authService);
    if (!authService) return false;

    // Set event listener BEFORE calling SDKAuth
    authService->SetEvent(new AuthServiceEventListener(&OnAuthenticationComplete));

    // Authenticate with JWT
    AuthContext authContext;
    authContext.jwt_token = jwtToken.c_str();

    SDKError err = authService->SDKAuth(authContext);
    if (err != SDKERR_SUCCESS) {
        std::wcout << L"SDKAuth failed: " << err << std::endl;
        return false;
    }

    // CRITICAL: Add message loop or callback won't fire!
    // See complete example: examples/authentication-pattern.md

    return true;
}

AuthServiceEventListener.h:

#include <windows.h>
#include <cstdint>
#include <auth_service_interface.h>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class AuthServiceEventListener : public IAuthServiceEvent {
public:
    AuthServiceEventListener(void (*onComplete)())
        : onAuthComplete(onComplete) {}

    void onAuthenticationReturn(AuthResult ret) override {
        if (ret == AUTHRET_SUCCESS && onAuthComplete) {
            onAuthComplete();
        } else {
            std::cout << "Auth failed: " << ret << std::endl;
        }
    }

    // Must implement ALL pure virtual methods (6 total)
    void onLoginReturnWithReason(LOGINSTATUS ret, IAccountInfo* info, LoginFailReason reason) override {}
    void onLogout() override {}
    void onZoomIdentityExpired() override {}
    void onZoomAuthIdentityExpired() override {}
#if defined(WIN32)
    void onNotificationServiceStatus(SDKNotificationServiceStatus status, SDKNotificationServiceError error) override {}
#endif

private:
    void (*onAuthComplete)();
};

See complete working code: Authentication Pattern Guide

3. Join Meeting

#include <meeting_service_interface.h>
#include "MeetingServiceEventListener.h"

IMeetingService* meetingService = nullptr;

void OnMeetingJoined() {
    std::cout << "Joining meeting..." << std::endl;
}

void OnInMeeting() {
    std::cout << "In meeting now!" << std::endl;
    // Start raw data capture here
}

void OnMeetingEnds() {
    std::cout << "Meeting ended" << std::endl;
}

bool JoinMeeting(UINT64 meetingNumber, const std::wstring& password) {
    CreateMeetingService(&meetingService);
    if (!meetingService) return false;

    // Set event listener
    meetingService->SetEvent(
        new MeetingServiceEventListener(&OnMeetingJoined, &OnMeetingEnds, &OnInMeeting)
    );

    // Prepare join parameters
    JoinParam joinParam;
    joinParam.userType = SDK_UT_WITHOUT_LOGIN;

    JoinParam4WithoutLogin& params = joinParam.param.withoutloginuserJoin;
    params.meetingNumber = meetingNumber;
    params.userName = L"Bot User";
    params.psw = password.c_str();
    params.isVideoOff = false;
    params.isAudioOff = false;

    SDKError err = meetingService->Join(joinParam);
    if (err != SDKERR_SUCCESS) {
        std::wcout << L"Join failed: " << err << std::endl;
        return false;
    }
    return true;
}

MeetingServiceEventListener.h:

#include <windows.h>
#include <cstdint>
#include <meeting_service_interface.h>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class MeetingServiceEventListener : public IMeetingServiceEvent {
public:
    MeetingServiceEventListener(
        void (*onJoined)(),
        void (*onEnded)(),
        void (*onInMeeting)()
    ) : onMeetingJoined(onJoined),
        onMeetingEnded(onEnded),
        onInMeetingCallback(onInMeeting) {}

    void onMeetingStatusChanged(MeetingStatus status, int iResult) override {
        if (status == MEETING_STATUS_CONNECTING) {
            if (onMeetingJoined) onMeetingJoined();
        }
        else if (status == MEETING_STATUS_INMEETING) {
            if (onInMeetingCallback) onInMeetingCallback();
        }
        else if (status == MEETING_STATUS_ENDED) {
            if (onMeetingEnded) onMeetingEnded();
        }
    }

    // Must implement ALL pure virtual methods (9 total)
    void onMeetingStatisticsWarningNotification(StatisticsWarningType type) override {}
    void onMeetingParameterNotification(const MeetingParameter* param) override {}
    void onSuspendParticipantsActivities() override {}
    void onAICompanionActiveChangeNotice(bool isActive) override {}
    void onMeetingTopicChanged(const zchar_t* sTopic) override {}
    void onMeetingFullToWatchLiveStream(const zchar_t* sLiveStreamUrl) override {}
    void onUserNetworkStatusChanged(MeetingComponentType type, ConnectionQuality level, unsigned int userId, bool uplink) override {}
#if defined(WIN32)
    void onAppSignalPanelUpdated(IMeetingAppSignalHandler* pHandler) override {}
#endif

private:
    void (*onMeetingJoined)();
    void (*onMeetingEnded)();
    void (*onInMeetingCallback)();
};

See all required methods: Interface Methods Guide

4. Subscribe to Raw Video

#include <windows.h>
#include <cstdint>
#include <rawdata/zoom_rawdata_api.h>
#include <rawdata/rawdata_renderer_interface.h>
#include <zoom_sdk_raw_data_def.h>  // REQUIRED for YUVRawDataI420
#include "ZoomSDKRendererDelegate.h"

IZoomSDKRenderer* videoHelper = nullptr;
ZoomSDKRendererDelegate* videoSource = new ZoomSDKRendererDelegate();

bool StartVideoCapture(uint32_t userId) {
    // STEP 1: Start raw recording FIRST (required!)
    IMeetingRecordingController* recordCtrl =
        meetingService->GetMeetingRecordingController();

    SDKError canStart = recordCtrl->CanStartRawRecording();
    if (canStart != SDKERR_SUCCESS) {
        std::cout << "Cannot start recording: " << canStart << std::endl;
        return false;
    }

    recordCtrl->StartRawRecording();

    // Wait for recording to initialize
    std::this_thread::sleep_for(std::chrono::milliseconds(500));

    // STEP 2: Create renderer
    SDKError err = createRenderer(&videoHelper, videoSource);
    if (err != SDKERR_SUCCESS || !videoHelper) {
        std::cout << "createRenderer failed: " << err << std::endl;
        return false;
    }

    // STEP 3: Set resolution and subscribe
    videoHelper->setRawDataResolution(ZoomSDKResolution_720P);
    err = videoHelper->subscribe(userId, RAW_DATA_TYPE_VIDEO);
    if (err != SDKERR_SUCCESS) {
        std::cout << "Subscribe failed: " << err << std::endl;
        return false;
    }

    std::cout << "Video capture started! Frames arrive in onRawDataFrameReceived()" << std::endl;
    return true;
}

ZoomSDKRendererDelegate.h:

#include <windows.h>
#include <cstdint>
#include <rawdata/rawdata_renderer_interface.h>
#include <zoom_sdk_raw_data_def.h>
#include <fstream>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class ZoomSDKRendererDelegate : public IZoomSDKRendererDelegate {
public:
    void onRawDataFrameReceived(YUVRawDataI420* data) override {
        if (!data) return;

        // YUV420 (I420) format: Y plane + U plane + V plane
        int width = data->GetStreamWidth();
        int height = data->GetStreamHeight();

        // Calculate buffer sizes
        // Y = full resolution, U/V = quarter resolution each
        size_t ySize = width * height;
        size_t uvSize = ySize / 4;  // (width/2) * (height/2)

        // Total size: width * height * 1.5 bytes

        // Save to file (playback: ffplay -f rawvideo -pixel_format yuv420p -video_size 1280x720 output.yuv)
        std::ofstream outputFile("output.yuv", std::ios::binary | std::ios::app);
        outputFile.write(data->GetYBuffer(), ySize);    // Brightness
        outputFile.write(data->GetUBuffer(), uvSize);   // Blue-difference
        outputFile.write(data->GetVBuffer(), uvSize);   // Red-difference
        outputFile.close();
    }

    void onRawDataStatusChanged(RawDataStatus status) override {
        std::cout << "Raw data status: " << status << std::endl;
    }

    void onRendererBeDestroyed() override {
        std::cout << "Renderer destroyed" << std::endl;
    }
};

Complete video capture guide: Raw Video Capture Guide

5. Subscribe to Raw Audio

#include <rawdata/rawdata_audio_helper_interface.h>

class ZoomSDKAudioRawDataDelegate : public IZoomSDKAudioRawDataDelegate {
public:
    void onMixedAudioRawDataReceived(AudioRawData* data) override {
        // Process PCM audio (mixed from all participants)
        std::ofstream pcmFile("audio.pcm", std::ios::binary | std::ios::app);
        pcmFile.write((char*)data->GetBuffer(), data->GetBufferLen());
        pcmFile.close();
    }

    void onOneWayAudioRawDataReceived(AudioRawData* data, uint32_t node_id) override {
        // Process audio from specific participant
    }
};

// Subscribe to audio
IZoomSDKAudioRawDataHelper* audioHelper = GetAudioRawdataHelper();
audioHelper->subscribe(new ZoomSDKAudioRawDataDelegate());

6. Main Message Loop (CRITICAL!)

⚠️ WITHOUT THIS, CALLBACKS WON'T FIRE!

#include <windows.h>
#include <thread>
#include <chrono>

int main() {
    // Initialize COM
    CoInitialize(NULL);

    // Load config and initialize
    LoadConfig();
    InitMeetingSDK();
    AuthenticateSDK(sdk_jwt);

    // CRITICAL: Windows message loop for SDK callbacks
    // SDK uses Windows message pump to dispatch callbacks
    // Without this, callbacks are queued but NEVER fire!
    MSG msg;
    while (!g_exit) {
        // Process all pending Windows messages
        while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) {
            if (msg.message == WM_QUIT) {
                g_exit = true;
                break;
            }
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

        // Small sleep to avoid busy-waiting
        std::this_thread::sleep_for(std::chrono::milliseconds(100));
    }

    // Cleanup
    CleanSDK();
    CoUninitialize();

    return 0;
}

Why message loop is critical: The SDK uses Windows COM/messaging for async callbacks. Without PeekMessage(), the SDK queues messages but they're never retrieved/dispatched, so callbacks never execute.

Symptoms without message loop:

• Authentication timeout (even with valid JWT)
• Meeting join timeout
• No callback events fire
• Appears like network/auth issue but it's a message loop issue

See detailed explanation: Windows Message Loop Guide

Common Issues & Solutions

Complete troubleshooting: Common Issues Guide

How to Implement Any Feature

The SDK has 35+ feature controllers (audio, video, chat, recording, participants, screen sharing, breakout rooms, webinars, Q&A, polling, whiteboard, captions, AI companion, etc.).

Universal pattern that works for ALL features:

1. Get the controller (singleton):

   IMeetingAudioController* audioCtrl = meetingService->GetMeetingAudioController();
   IMeetingChatController* chatCtrl = meetingService->GetMeetingChatController();
   // ... 33 more controllers available
   

2. Implement event listener (observer pattern):

   class MyAudioListener : public IMeetingAudioCtrlEvent {
       void onUserAudioStatusChange(IList<IUserAudioStatus*>* lst) override {
           // React to audio events
       }
       // ... implement all required methods
   };
   

3. Register and use:

   audioCtrl->SetEvent(new MyAudioListener());
   audioCtrl->MuteAudio(userId, true);  // Use feature
   

Complete guide with examples: SDK Architecture Pattern

Available Examples

Detailed References

🎯 Core Concepts (START HERE!)

• concepts/sdk-architecture-pattern.md - Universal pattern for implementing ANY feature - Understanding this unlocks the entire SDK!

📚 Complete Examples

• examples/authentication-pattern.md - Complete working authentication with JWT tokens
• examples/raw-video-capture.md - YUV420 video capture with detailed format explanation

🔧 Troubleshooting Guides

• troubleshooting/windows-message-loop.md - Why callbacks don't fire (MOST CRITICAL!)
• troubleshooting/build-errors.md - SDK header dependency issues and fixes
• troubleshooting/common-issues.md - Quick diagnostic workflow and error code tables

📖 References

• references/interface-methods.md - How to implement ALL required virtual methods
• references/windows-reference.md - Dependencies, Visual Studio setup
• ../references/authorization.md - SDK JWT generation
• ../references/bot-authentication.md - Bot token types (ZAK, OBF, JWT)

🎨 Feature-Specific Guides

• ../references/breakout-rooms.md - Programmatic breakout room management
• ../references/ai-companion.md - AI Companion controls

Sample Repositories

Playing Raw Video/Audio Files

Raw YUV/PCM files have no headers - you must specify format explicitly.

Play Raw YUV Video

ffplay -video_size 1280x720 -pixel_format yuv420p -f rawvideo output.yuv

Convert YUV to MP4

ffmpeg -video_size 1280x720 -pixel_format yuv420p -f rawvideo -i output.yuv -c:v libx264 output.mp4

Play Raw PCM Audio

ffplay -f s16le -ar 32000 -ac 1 audio.pcm

Convert PCM to WAV

ffmpeg -f s16le -ar 32000 -ac 1 -i audio.pcm output.wav

Combine Video + Audio

ffmpeg -video_size 1280x720 -pixel_format yuv420p -f rawvideo -i output.yuv ^
       -f s16le -ar 32000 -ac 1 -i audio.pcm ^
       -c:v libx264 -c:a aac -shortest output.mp4

Key flags:

Authentication Requirements (2026 Update)

Important: Beginning March 2, 2026, apps joining meetings outside their account must be authorized.

Use one of:

• App Privilege Token (OBF) - Recommended for bots (app_privilege_token in JoinParam)
• ZAK Token - Zoom Access Key (userZAK in JoinParam)
• On Behalf Token - For specific use cases (onBehalfToken in JoinParam)

📖 Complete Documentation Library

This skill includes comprehensive guides created from real-world debugging:

🎯 Start Here

• SDK Architecture Pattern - Master document: Universal pattern for ANY feature
• SKILL.md - Complete navigation guide

📚 By Category

Core Concepts:

• SDK Architecture Pattern - How every feature works (singleton + observer pattern)

Complete Examples:

• Authentication Pattern - Working JWT auth with all code
• Raw Video Capture - YUV420 video capture explained

Troubleshooting:

• Windows Message Loop - CRITICAL: Why callbacks don't fire
• Build Errors - SDK header dependency fixes
• Common Issues - Quick diagnostics & error codes

References:

• Interface Methods - All required virtual methods (6 auth + 9 meeting)
• Windows Reference - Platform setup
• Authorization - JWT generation
• Bot Authentication - Bot token types
• Breakout Rooms - Breakout room API
• AI Companion - AI features

🚨 Most Critical Issues (From Real Debugging)

1. Callbacks not firing → Missing Windows message loop (99% of issues)

   • See: Windows Message Loop Guide

2. Build errors → SDK header dependencies (uint32_t, AudioType, etc.)

   • See: Build Errors Guide

3. Abstract class errors → Missing virtual method implementations

   • See: Interface Methods Guide

💡 Key Insight

Once you learn the 3-step pattern, you can implement ANY of the 35+ features:

1. Get controller → 2. Implement event listener → 3. Register and use

See: SDK Architecture Pattern

Official Resources

• Official docs: https://developers.zoom.us/docs/meeting-sdk/windows/
• API Reference: https://marketplacefront.zoom.us/sdk/meeting/windows/annotated.html
• Developer forum: https://devforum.zoom.us/
• SDK download: https://marketplace.zoom.us/

Documentation Version: Based on Zoom Windows Meeting SDK v6.7.2.26830

Need help? Start with SKILL.md for complete navigation.

Merged from meeting-sdk/windows/SKILL.md

Zoom Windows Meeting SDK - Complete Documentation Index

🚀 Quick Start Path

If you're new to the SDK, follow this order:

1. Read the architecture pattern → concepts/sdk-architecture-pattern.md

   • This teaches you the universal formula that applies to ALL features
   • Once you understand this, you can implement any feature by reading the .h files

2. Fix build errors → troubleshooting/build-errors.md

   • SDK header dependencies issues
   • Required include order

3. Implement authentication → examples/authentication-pattern.md

   • Complete working JWT authentication code

4. Fix callback issues → troubleshooting/windows-message-loop.md

   • CRITICAL: Why callbacks don't fire without Windows message loop
   • This was the hardest issue to diagnose!

5. Implement virtual methods → references/interface-methods.md

   • Complete lists of all required methods
   • How to avoid abstract class errors

6. Capture video (optional) → examples/raw-video-capture.md

   • YUV420 format explained
   • Complete raw data capture workflow

7. Troubleshoot any issues → troubleshooting/common-issues.md

   • Quick diagnostic checklist
   • Error code tables
   • "If you see X, do Y" reference

📂 Documentation Structure

meeting-sdk/windows/
├── SKILL.md                           # Main skill overview
├── SKILL.md                           # This file - navigation guide
│
├── concepts/                          # Core architectural patterns
│   ├── sdk-architecture-pattern.md   # THE MOST IMPORTANT DOC
│   │                                  # Universal formula for ANY feature
│   ├── singleton-hierarchy.md        # Navigation guide for SDK services
│   │                                  # 4-level deep service tree, when/how
│   ├── custom-ui-architecture.md     # How Custom UI rendering works
│   │                                  # Child HWNDs, D3D, layout, events
│   └── custom-ui-vs-raw-data.md      # SDK-rendered vs self-rendered
│                                      # Decision guide for Custom UI approach
│
├── examples/                          # Complete working code
│   ├── authentication-pattern.md     # JWT auth with full code
│   ├── raw-video-capture.md          # Video capture with YUV420 details
│   │                                  # Recording vs Streaming, permissions
│   ├── custom-ui-video-rendering.md  # Custom UI with video container
│   │                                  # Active speaker + gallery layout
│   ├── breakout-rooms.md             # Complete breakout room guide
│   │                                  # 5 roles, create/manage/join
│   ├── chat.md                       # Send/receive chat messages
│   │                                  # Rich text, threading, file transfer
│   ├── captions-transcription.md     # Live transcription & closed captions
│   │                                  # Multi-language translation
│   ├── local-recording.md            # Local MP4 recording
│   │                                  # Permission flow, encoder monitoring
│   ├── share-raw-data-capture.md     # Screen share raw data capture
│   │                                  # YUV420 frames from shared content
│   └── send-raw-data.md              # Virtual camera/mic/share
│                                      # Send custom video/audio/share
│
├── troubleshooting/                   # Problem solving guides
│   ├── windows-message-loop.md       # CRITICAL - Why callbacks fail
│   ├── build-errors.md               # Header dependency fixes + MSBuild
│   └── common-issues.md              # Quick diagnostic workflow
│
└── references/                        # Reference documentation
    ├── interface-methods.md           # Required virtual methods
    │                                  # Auth(6) + Meeting(9) + CustomUI(13)
    ├── windows-reference.md           # Platform setup
    ├── authorization.md               # JWT generation
    ├── bot-authentication.md          # Bot token types
    ├── breakout-rooms.md              # Breakout room features
    └── ai-companion.md                # AI Companion features

🎯 By Use Case

I want to build a meeting bot

1. SDK Architecture Pattern - Understand the pattern
2. Authentication Pattern - Join meetings
3. Windows Message Loop - Fix callback issues
4. Interface Methods - Implement callbacks

I'm getting build errors

1. Build Errors Guide - SDK header dependencies
2. Interface Methods - Abstract class errors
3. Common Issues - Linker errors

I'm getting runtime errors

1. Windows Message Loop - Callbacks not firing
2. Authentication Pattern - Auth timeout
3. Common Issues - Error code tables

I want to build a Custom UI meeting app

1. Custom UI Architecture - How SDK rendering works
2. SDK-Rendered vs Self-Rendered - Choose your approach
3. Custom UI Video Rendering - Complete working code
4. Interface Methods - 13 Custom UI virtual methods
5. Build Errors Guide - MSBuild from git bash

I want to capture video/audio

1. Raw Video Capture - Complete video workflow
   • Recording vs Streaming approaches
   • Permission requirements (host, OAuth tokens)
   • Audio PCM capture
2. Share Raw Data Capture - Screen share capture
   • Subscribe to RAW_DATA_TYPE_SHARE
   • Handle dynamic resolution
3. SDK Architecture Pattern - Controller pattern
4. Common Issues - No frames received

I want to use breakout rooms

1. Breakout Rooms Guide - Complete breakout room workflow
   • 5 roles: Creator, Admin, Data, Assistant, Attendee
   • Create, configure, manage, join/leave rooms
2. Common Issues - Breakout room error codes

I want to implement chat

1. Chat Guide - Send/receive messages
   • Rich text formatting (bold, italic, links)
   • Private messages and threading
   • File transfer events

I want to use live transcription

1. Captions & Transcription Guide - Live transcription
   • Automatic speech-to-text
   • Multi-language translation
   • Manual closed captions (host feature)

I want to record meetings

1. Local Recording Guide - Local MP4 recording
   • Permission request workflow
   • zTscoder.exe encoder monitoring
   • Gallery view vs active speaker

I want to implement a specific feature

1. SDK Architecture Pattern - START HERE!
2. Find the controller in SDK/x64/h/meeting_service_interface.h
3. Find the header in SDK/x64/h/meeting_service_components/
4. Follow the universal pattern: Get controller → Implement listener → Use methods

I want to understand the SDK architecture

1. SDK Architecture Pattern - Complete architecture overview
2. Singleton Hierarchy - Navigate the service tree (4 levels)
3. Interface Methods - Event listener pattern
4. Authentication Pattern - Service pattern

🔥 Most Critical Documents

1. SDK Architecture Pattern (⭐ MASTER DOCUMENT)

concepts/sdk-architecture-pattern.md

This is THE most important document. It teaches the universal 3-step pattern:

1. Get controller (singleton pattern)
2. Implement event listener (observer pattern)
3. Register and use

Once you understand this pattern, you can implement any of the 35+ features by just reading the SDK headers.

Key insight: The Zoom SDK follows a perfectly consistent architecture. Every feature works the same way.

2. Windows Message Loop (⚠️ MOST COMMON ISSUE)

troubleshooting/windows-message-loop.md

99% of "callbacks not firing" issues are caused by missing Windows message loop. This document explains:

• Why SDK requires PeekMessage() loop
• How to implement it correctly
• How to diagnose callback issues

This was the hardest bug to find during development (took ~2 hours).

3. Build Errors Guide

troubleshooting/build-errors.md

SDK headers have dependency bugs that cause build errors. This document provides:

• Required include order
• Missing <cstdint> fix
• Missing AudioType fix
• Missing YUVRawDataI420 fix

📊 By Document Type

Concepts (Why and How)

• SDK Architecture Pattern - Universal implementation pattern
• Singleton Hierarchy - Navigation guide for SDK services (4 levels deep)

Examples (Complete Working Code)

• Authentication Pattern - JWT authentication
• Raw Video Capture - Video capture with YUV420, recording vs streaming
• Custom UI Video Rendering - SDK-rendered video containers
• Breakout Rooms - Create, manage, join breakout rooms
• Chat - Send/receive messages with rich formatting
• Captions & Transcription - Live transcription and closed captions
• Local Recording - Local MP4 recording with permission flow
• Share Raw Data Capture - Screen share raw data capture
• Send Raw Data - Virtual camera, microphone, and share

Troubleshooting (Problem Solving)

• Windows Message Loop - Callback issues
• Build Errors - Compilation issues
• Common Issues - Quick diagnostics

References (Lookup Information)

• Interface Methods - Required virtual methods
• Windows Reference - Platform setup
• Authorization - JWT generation
• Bot Authentication - Bot tokens
• Breakout Rooms - Breakout room API
• AI Companion - AI features

💡 Key Learnings from Real Debugging

These documents were created from actual debugging of a non-functional Zoom SDK sample. Here are the key insights:

Critical Discoveries:

1. Windows Message Loop is MANDATORY (not optional)

   • SDK uses Windows message pump for callbacks
   • Without it, callbacks are queued but never fire
   • Manifests as "authentication timeout" even with valid JWT
   • See: Windows Message Loop Guide

2. SDK Headers Have Dependency Bugs

   • Missing #include <cstdint> in SDK headers
   • meeting_participants_ctrl_interface.h doesn't include meeting_audio_interface.h
   • `rawdata_renderer_interfac

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