>can i override the event code for the .vcx in my form
>if so how & where that code will be written to

Any code placed in an event or method overides code that would normally fire in that event or method that exists at a higher class level. This is ture whether it's in a form or a subclass of any class. To have an event or method execute both your code and the class code, have a look at the help topic on "::" (the scope resolution operator).