EOS API reference page for EOS_Sessions_RegisterPlayers

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This function is part of the Sessions Interface.


Register a group of players with the session, allowing them to invite others or otherwise indicate they are part of the session for determining a full session

Return Value

  • EOS_Success if the register completes successfully

  • EOS_NoChange if the players to register registered previously

  • EOS_InvalidParameters if any of the options are incorrect

  • EOS_Sessions_OutOfSync if the session is out of sync and will be updated on the next connection with the backend

  • EOS_NotFound if a session to register players does not exist



Parameter Type And NameUsage Information
EOS_HSessions Handle
const EOS_Sessions_RegisterPlayersOptions* OptionsStructure containing information about the session and players to be registered
void* ClientDataArbitrary data that is passed back to you in the CompletionDelegate
const EOS_Sessions_OnRegisterPlayersCallback CompletionDelegateA callback that is fired when the registration operation completes, either successfully or in error

Callback Function Information

Because this function is asynchronous, it employs a callback of type EOS_Sessions_OnRegisterPlayersCallback to report the results of its operation.

Callback Remarks

Function prototype definition for callbacks passed to EOS_Sessions_RegisterPlayers

Callback Parameters


Parameter Type And NameUsage Information
const EOS_Sessions_RegisterPlayersCallbackInfo* DataA EOS_Sessions_RegisterPlayersCallbackInfo containing the output information and result