bool OnAuthenticationRequired(
	ISIPClientExtension extension,
	RequestAuthenticationInfo requestAuthInfo
)

Function OnAuthenticationRequired ( 
	extension As ISIPClientExtension,
	requestAuthInfo As RequestAuthenticationInfo
) As Boolean

bool OnAuthenticationRequired(
	ISIPClientExtension^ extension, 
	RequestAuthenticationInfo^ requestAuthInfo
)

abstract OnAuthenticationRequired : 
        extension : ISIPClientExtension * 
        requestAuthInfo : RequestAuthenticationInfo -> bool