Activities of a particular User in CRM system

Hi Group,

I have a requirement like this:

I want to have a <b>Function Module</b> that gives me the details of all the <b>Activities</b> done by a certain user.

eg., if I give a user as '<b>111</b>' , the <b>FunMod</b> should return me all the <b>Activities</b> that were being created by the user in the system( CRM ).

please let me know if you have any idea on this.

thanks and regards,

Vishnu.