public virtual int GetMessageItemIndex(
	Guid topicId,
	Guid messageId,
	int pageSize
)

Public Overridable Function GetMessageItemIndex ( 
	topicId As Guid,
	messageId As Guid,
	pageSize As Integer
) As Integer

public:
virtual int GetMessageItemIndex(
	Guid topicId, 
	Guid messageId, 
	int pageSize
)

abstract GetMessageItemIndex : 
        topicId : Guid * 
        messageId : Guid * 
        pageSize : int -> int 
override GetMessageItemIndex : 
        topicId : Guid * 
        messageId : Guid * 
        pageSize : int -> int