How to know device default calendar application is in use??

Hi All,

We are using a client-server application which notifies the Client (P800), if an appointment is added/modified/deleted from its Microsoft outlook server it synchronizes accordingly and more if client add/modify/delete an entry from default calendar application ,our application should synchronize this modified/deleted/added entries of the device with the Microsoft outlook entries as well, which is the duty of the server application.

Steps followed are :

1.   Symbian Application receives appointment/meeting notification pop- up with three buttons Accept, Decline, Tentative.

2.   If the user presses Accept or Tentative , appointments/meetings get saved into the device default calendar application.

3.   Now If we try to modify the saved appointment/meeting received from Microsoft Outlook server, it is giving the following panics
 

Program closed: MyAppName
Reason Code: KERN-EXEC
Reason No.: 3

Program : Calendar
Reason Code: E32USER CBase
Reason No.: 21

Program : Agenda Server
Reason Code: E32USER CBase
Reason No.: 46
 
Result : Our Application is Closed.
            Default Calendar application is also Closed.

4.  It clashes with the application agenda observer which is trying to trap the event if an appointment/meeting is added/modified/deleted from the device default calendar application.

 
Now the question arises “Is it possible to know that the device default calendar application is in use and a calendar task is being modified? So that our application can wait for that much of duration.”
           
 
Hope to get a reply
 Thanks