This class is used to pass challenge error information back to the application. The application creates an instance of this type and then calls one of the following API procedures to have the class initialized: GetChallengeErrorData(Int32, VoipMediaEngine..::.CHALLENGE_ERROR_DATA), GetRegisterChallengeErrorData(VoipMediaEngine..::.CHALLENGE_ERROR_DATA), GetSubscribeChallengeErrorData(UInt32, VoipMediaEngine..::.CHALLENGE_ERROR_DATA), and GetNotifyChallengeErrorData(UInt32, VoipMediaEngine..::.CHALLENGE_ERROR_DATA).

Normally your application will initialize the media engine with authentication credentials using the AddAuthorizationCredentials(String, String, String) API procedure. When the media engine performs an operation, it handles all of the details associated with processing an authentication challenge. If an authentication challenge response cannot be constructed based on the authorization credentials previously specified, then the media engine returns a value or sends an event to your application signaling that a challenge operation could not successfully be performed.

The challenge error data is available when you receive the API return values:

Challenge error data is also available when you receive the following events:

public class CHALLENGE_ERROR_DATA : IDisposable

Public Class CHALLENGE_ERROR_DATA _
	Implements IDisposable

public ref class CHALLENGE_ERROR_DATA : IDisposable

public class CHALLENGE_ERROR_DATA implements IDisposable