Public ReadOnly Property Id As Integer

Dim instance As MessageBase
Dim value As Integer
 
value = instance.Id

public int Id {get;}

public: __property int get_Id();

public:
property int Id {
   int get();
}

Property Value

MessageBase.Id is initialized at login to an auto-incremented integer, ranging from 1 to number of messages. This property is useful for referring to a particular message within your application. Note: MessageBase.Id is 1-based and any containing list is 0-based, so to access the message with an Id 1 you will access List[0].

This value may change as messages are added or removed.

Reference

MessageBase Class
MessageBase Members