Common Objectadded,Objectmodified events

Hi My problem is i need to use the events like object added, object modified in all the drawings.I am now able to do this for a particular drawing file only,when i open a new drawing i am unable to get the evnts in that file, (i.e) the events are specific to the file where it has been created. Now what i need is to define the events in common project so that it can be triggered in any drawing file (Something like autocad). We are in immediete requirement.Please let us know the solution.Thanks Sri