Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

▼Ndiscordpp	The namespace for the generated Discord SDK bindings
CActivity	An Activity represents one "thing" a user is doing on Discord and is part of their rich presence
CActivityAssets	Struct which controls what your rich presence looks like in the Discord client. If you don't specify any values, the icon and name of your application will be used as defaults
CActivityButton
CActivityInvite	When one user invites another to join their game on Discord, it will send a message to that user. The SDK will parse those messages for you automatically, and this struct contains all of the relevant invite information which is needed to later accept that invite
CActivityParty
CActivitySecrets
CActivityTimestamps
CAdditionalContent	Contains information about non-text content in a message that likely cannot be rendered in game such as images, videos, embeds, polls, and more
CAudioDevice	Represents a single input or output audio device available to the user
CAuthorizationArgs	Arguments to the Client::Authorize function
CAuthorizationCodeChallenge	Struct that encapsulates the challenge part of the code verification flow
CAuthorizationCodeVerifier	Struct that encapsulates both parts of the code verification flow
CCall	Class that manages an active voice session in a Lobby
CCallInfoHandle	Convenience class that represents the state of a single Discord call in a lobby
CChannelHandle	All messages sent on Discord are done so in a Channel. MessageHandle::ChannelId will contain the ID of the channel a message was sent in, and Client::GetChannelHandle will return an instance of this class
CClient	Main entry point for the Discord SDK. All functionality is exposed through this class
CClientResult	Struct that stores information about the result of an SDK function call
CDeviceAuthorizationArgs	Arguments to the Client::GetTokenFromDevice function
CGuildChannel	Represents a channel in a guild that the current user is a member of and may be able to be linked to a lobby
CGuildMinimal	Represents a guild (also knowns as a Discord server), that the current user is a member of, that contains channels that can be linked to a lobby
CLinkedChannel	Struct that stores information about the channel that a lobby is linked to
CLinkedLobby	Struct that stores information about the lobby linked to a channel
CLobbyHandle	A LobbyHandle represents a single lobby in the SDK. A lobby can be thought of as just an arbitrary, developer-controlled group of users that can communicate with each other
CLobbyMemberHandle	A LobbyMemberHandle represents the state of a single user in a Lobby
CMessageHandle	A MessageHandle represents a single message received by the SDK
CRelationshipHandle	A RelationshipHandle represents the relationship between the current user and a target user on Discord. Relationships include friends, blocked users, and friend invites
CUserHandle	A UserHandle represents a single user on Discord that the SDK knows about and contains basic account information for them such as id, name, and avatar, as well as their "status" information which includes both whether they are online/offline/etc as well as whether they are playing this game
CVADThresholdSettings	Settings for the void auto detection threshold for picking up activity from a user's mic
CVoiceStateHandle	A VoiceStateHandle represents the state of a single participant in a Discord voice call