A server supplied "cookie" corresponding to the Source and Condition Name pair that in addition to the Active Time uniquely identifies a specific event notification. Cookies are passed to the client in the event notification. The client is responsible for returning the same cookie parameter, received in the event notification, back to the server in the condition acknowledgment.

'Declaration
 
Public Property Cookie As Long

'Usage
 
Dim instance As AEAcknowledgeConditionArguments
Dim value As Long
 
instance.Cookie = value
 
value = instance.Cookie

public long Cookie {get; set;}

public:
property int64 Cookie {
   int64 get();
   void set (    int64 value);
}