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

Boolean
CAnchorData
CAudioManager
CAudioSource
CAudioSourceMusic
CBadge
CBadgeEditor
CBlock
CBlockModel
CBlockModelClip
CBlockModelVariant
CBlockModelVariantAir
CBlockModelVariantGround
CBlockUnit
CBlockUnitModel
CCollector
CDataMgr
CEditorPlugin
CEditorPluginEvent
CEditorPluginLayer
CGameAchievementScriptAchievement
CGameAchievementScriptAchievementDesc
CGameAchievementScriptEvent
CGameAchievementScriptManager
CGameAchievementScriptStat
CGameAchievementScriptStatDesc
CGameAchievementScriptUplayAction
CGameManagerBadgeScript
CGameManiaAppMinimal
CGameManiaAppPlaygroundScriptEvent
CGameMasterServerOnlineSignal
CGameMasterServerOnlineSignal_RecordBeaten
CGameMasterServerPlayerOnlinePresence
CGameMasterServerRichPresenceTaskResult_GetOnlinePresenceForPlayersScript
CGameMasterServerRichPresenceTaskResult_PlayerOnlinePresenceList
CGameNetServerInfo
CGamePlaygroundModuleServer
CGamePlaygroundModuleServerHud
CGamePlaygroundModuleServerInventory
CGamePlaygroundModuleServerScoresTable
CGamePlaygroundModuleServerStore
CGamePluginInterfacesScript
CGameRealLeaderBoardInfo
CGameScriptNotificationsConsumer
CGameScriptNotificationsConsumerEvent
CGameScriptNotificationsConsumerNotification
CGameUserManagerScript
CGameUserProfile
CGameUserScript
CGhost
CHighScore
CHighScoreComparison
CHighScoreComparisonSummary
CHttpManager
CHttpRequest
CImage
CInputEvent
CInputManager
CInputPad
CItemAnchor
CMacroblockModel
CManiaApp
CManiaAppBrowser
CManiaAppEvent
CManiaAppPlayground
CManiaAppPlaygroundCommon
CManiaAppTitle
CManiaAppTitleLayer
CManiaPlanet
CManiaplanetPluginInterface
CManiaplanetPluginInterfaceEvent
CMap
CMapInfo
CMapType
CMasterServerUser
CMlBrowser
CMlCamera
CMlControl
CMlEntry
CMlEvent
CMlFileEntry
CMlFrame
CMlGauge
CMlGraph
CMlGraphCurve
CMlLabel
CMlMediaPlayer
CMlMinimap
CMlPage
CMlQuad
CMlScript
CMlScriptIngame
CMlStation
CMlTextEdit
CMode
CNetMasterHost
CNetMasterServerUserInfo
CNetUbiServicesNews
CNod
CPlayer
CPlaygroundClient
CPlug
CPresenceMgr
CPrivilegeMgr
CScore
CScoreMgr
CServerInfo
CSmAction
CSmActionEvent
CSmBase
CSmBlock
CSmBlockPole
CSmGauge
CSmLandmark
CSmMapBase
CSmMapBotPath
CSmMapBotSpawn
CSmMapGate
CSmMapGauge
CSmMapLandmark
CSmMapObjectAnchor
CSmMapPlayerSpawn
CSmMapSector
CSmMapType
CSmMlScriptIngame
CSmMode
CSmModeEvent
CSmObject
CSmPlayer
CSmPlayerDriver
CSmScore
CSmSector
CStation
CTeam
CTitle
CTitleFlow
CTmMapType
CTmMlPlayer
CTmMlScriptIngame
CTmMode
CTmModeEvent
CTmPlayer
CTmRaceClientEvent
CTmResult
CTmScore
CTrackManiaScore
CUIConfig
CUIConfigMgr
CUILayer
CUser
CVideo
CVideoManager
CWebServicesTaskResult
CWebServicesTaskResult_BuddiesChallengeRecord
CWebServicesTaskResult_BuddiesChallengeRecordsComparison
CWebServicesTaskResult_BuddyChallengeRecordsComparison
CWebServicesTaskResult_CheckTargetedPrivilegeResult
CWebServicesTaskResult_CheckTargetedPrivilegeResultScript
CWebServicesTaskResult_GetDisplayNameScriptResult
CWebServicesTaskResult_GhostHandle
CWebServicesTaskResult_LaunchUplayScriptResult
CWebServicesTaskResult_RealLeaderBoard
CWebServicesTaskResult_Session_Get
CWebServicesTaskResult_ZoneList
CXmlDocument
CXmlManager
CXmlNode
CXmlRpc
CXmlRpcEvent
CZone
Ident
Int3
Integer
Real
Text
Vec2
Vec3
Void