Error C2061: syntax error: identifier 'uint32_t'
Error C3646: 'GetAudioJoinType': unknown override specifier
Error C2059: syntax error: ')'
Error C2238: unexpected token(s) preceding ';'

Errors occur in SDK headers:

rawdata/rawdata_renderer_interface.h (lines 57, 65)
meeting_service_components/meeting_participants_ctrl_interface.h (line 139)

Root Cause

The SDK headers use uint32_t but don’t include <cstdint> where it’s defined.

Solution

Add #include <cstdint> to ALL your header files, right after <windows.h>:

// YourListener.h
#pragma once
#include <windows.h>
#include <cstdint>  // CRITICAL: Must come before SDK headers!
#include <auth_service_interface.h>

Required in:

All .h files that include SDK headers
main.cpp or any .cpp that includes SDK headers directly

Critical Include Order

// 1. Windows header FIRST
#include <windows.h>

// 2. Standard int types SECOND (for uint32_t)
#include <cstdint>

// 3. Other standard headers
#include <iostream>
#include <vector>

// 4. Zoom SDK headers LAST
#include <zoom_sdk.h>
#include <meeting_service_interface.h>

This order is MANDATORY and must be followed in every file!

Error 2: `AudioType` Undefined

Symptoms

Error C3646: 'GetAudioJoinType': unknown override specifier
Error C2059: syntax error: ')'

Error occurs when including:

#include <meeting_service_components/meeting_participants_ctrl_interface.h>

Root Cause

meeting_participants_ctrl_interface.h uses AudioType enum (line 139) but doesn’t include meeting_audio_interface.h where AudioType is defined.

Solution

Include meeting_audio_interface.h BEFORE meeting_participants_ctrl_interface.h:

// Correct order
#include <meeting_service_components/meeting_audio_interface.h>      // FIRST
#include <meeting_service_components/meeting_participants_ctrl_interface.h>  // SECOND

Wrong order will fail:

// ❌ This will cause errors!
#include <meeting_service_components/meeting_participants_ctrl_interface.h>
#include <meeting_service_components/meeting_audio_interface.h>

Error 3: `YUVRawDataI420` Incomplete Type

Symptoms

Error: use of undefined type 'YUVRawDataI420'
Error: incomplete type is not allowed

Root Cause

rawdata/rawdata_renderer_interface.h only forward-declares YUVRawDataI420:

class YUVRawDataI420;  // Forward declaration only!

The full class definition is in zoom_sdk_raw_data_def.h.

Solution

Include zoom_sdk_raw_data_def.h in your renderer delegate header:

// YourRendererDelegate.h
#pragma once
#include <windows.h>
#include <cstdint>
#include <rawdata/rawdata_renderer_interface.h>
#include <zoom_sdk_raw_data_def.h>  // Full YUVRawDataI420 definition

Error 4: Abstract Class Cannot Be Instantiated

Symptoms

Error C2259: 'MeetingServiceEventListener': cannot instantiate abstract class
Error: pure virtual function "IMeetingServiceEvent::onUserNetworkStatusChanged" has no overrider
Error: pure virtual function "IMeetingServiceEvent::onAppSignalPanelUpdated" has no overrider

Root Cause

Missing implementation of pure virtual methods (methods marked with = 0) required by SDK interfaces.

Solution

Implement ALL pure virtual methods from the SDK interface.

For IMeetingServiceEvent (SDK v6.7.2.26830):

class MyMeetingListener : public IMeetingServiceEvent {
public:
    // Required by ALL versions
    void onMeetingStatusChanged(MeetingStatus status, int iResult) override;
    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;
    
    // Required when WIN32 is defined
    #if defined(WIN32)
    void onAppSignalPanelUpdated(IMeetingAppSignalHandler* pHandler) override;
    #endif
};

How to Find All Required Methods

Open the SDK header file (e.g., meeting_service_interface.h)
Search for the interface class (e.g., class IMeetingServiceEvent)
Look for all methods marked with = 0 (pure virtual)
Implement every single one

Example from SDK header:

class IMeetingServiceEvent {
public:
    virtual void onMeetingStatusChanged(...) = 0;  // Must implement!
    virtual void onMeetingStatisticsWarningNotification(...) = 0;  // Must implement!
    // ... etc
};

Error 5: Override Specifier Did Not Override

Symptoms

Error C3668: method with override specifier 'override' did not override any base class methods

Root Cause

Method signature doesn’t exactly match the base class, or the method doesn’t exist in the SDK interface (usually due to conditional compilation).

Solution

Check for conditional compilation:

// ❌ Wrong: Will fail if WIN32 is not defined
void onNotificationServiceStatus(...) override;

// ✅ Correct: Match SDK's conditional compilation
#if defined(WIN32)
void onNotificationServiceStatus(...) override;
#endif

Verify method signature matches exactly:

Parameter types must match exactly
const qualifiers must match
Parameter names don’t matter, but types do

Complete Include Template

For Main Application File

// main.cpp
#include <windows.h>
#include <cstdint>
#include <iostream>
#include <fstream>
#include <string>
#include <thread>
#include <chrono>

// Zoom SDK headers - ORDER MATTERS!
#include <zoom_sdk.h>
#include <auth_service_interface.h>
#include <meeting_service_interface.h>
#include <meeting_service_components/meeting_recording_interface.h>
#include <meeting_service_components/meeting_audio_interface.h>  // BEFORE participants!
#include <meeting_service_components/meeting_participants_ctrl_interface.h>
#include <rawdata/zoom_rawdata_api.h>
#include <rawdata/rawdata_renderer_interface.h>

// Third-party libraries
#include <json/json.h>

// Your headers
#include "AuthServiceEventListener.h"
#include "MeetingServiceEventListener.h"
#include "ZoomSDKRendererDelegate.h"

For Event Listener Headers

// AuthServiceEventListener.h
#pragma once
#include <windows.h>
#include <cstdint>
#include <auth_service_interface.h>
#include <iostream>

using namespace ZOOM_SDK_NAMESPACE;

class AuthServiceEventListener : public IAuthServiceEvent {
public:
    // ... methods ...
};

For Renderer Delegate Headers

// ZoomSDKRendererDelegate.h
#pragma once
#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:
    // ... methods ...
};

Preprocessor Definitions

Required Definition: WIN32

For correct SDK interface behavior, define WIN32 in project settings:

Visual Studio .vcxproj:

<PreprocessorDefinitions>WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)</PreprocessorDefinitions>

CMake:

target_compile_definitions(YourTarget PRIVATE WIN32)

Why: SDK uses #if defined(WIN32) to conditionally include platform-specific methods. Without it, you’ll miss required methods or have methods that don’t exist in the interface.

Quick Troubleshooting Checklist

When you get build errors:

Not done: Is <windows.h> the FIRST include?
Not done: Is <cstdint> included after <windows.h> in ALL headers?
Not done: Is <cstdint> included BEFORE any SDK headers?
Not done: Is meeting_audio_interface.h included before meeting_participants_ctrl_interface.h?
Not done: Is zoom_sdk_raw_data_def.h included for raw data delegates?
Not done: Are ALL pure virtual methods implemented?
Not done: Is WIN32 defined in preprocessor definitions?
Not done: Do method signatures exactly match the SDK interface (including const)?
Not done: Are conditional methods (#if defined(WIN32)) handled correctly?

# Search for pure virtual methods in interface
grep "= 0" SDK/x64/h/meeting_service_interface.h

SDK v6.7.2.26830 requirements:

IMeetingServiceEvent: 9 methods (8 + 1 WIN32-specific)
IAuthServiceEvent: 6 methods (5 + 1 WIN32-specific)
IZoomSDKRendererDelegate: 3 methods

MSBuild Command Pattern

When building from git bash on Windows, use this invocation pattern:

# Git bash requires unix-style path for the exe and //p: (double slash) for switches
"/c/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/MSBuild/Current/Bin/MSBuild.exe" \
  "C:\tempsdk\zoom-windows-sdk-sample\ZoomSDKSample.vcxproj" \
  //p:Configuration=Release //p:Platform=x64

Key gotchas:

Use forward slashes for the MSBuild exe path (/c/Program Files/...)
Use //p: not /p: — git bash interprets single /p as a path
Use //t:Rebuild for clean rebuilds
The .vcxproj path can use either forward or backslashes

From cmd.exe / PowerShell (normal Windows paths):

"C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\MSBuild\Current\Bin\MSBuild.exe" ^
  ZoomSDKSample.vcxproj /p:Configuration=Release /p:Platform=x64