Question about insertitem in component interface

Hi:
I'm using component interface in my work and face a question. When I use InsertItem function in peoplecode, I'm confused about its relationship with ActiveRowCount property of Row class. I need to check the data inserted in the record, so I put logic in component fieldchange event, uses ActiveRowCount to loop in the record to check every one row .
In the PIA, if we insert one row(by click add button) for some record, ActiveRowCount seems include the row you just insert even if you have not click save button. But when I use InsertItem and triggered a FieldChange event, ActiveRowCount in this event seems not include the new row inserted by InsertItem function. It is quite different from inserting in PIA. I'm not sure whether I uses InsertItem in a wrong way or it is just a mechanism that component interface implemented to exclude InsertItem inserted row in ActiveRowCount ? Hope someone can help me. Thanks a lot.

That doesn't make sense to me. Regardless of whether you are going through the PIA or through a Component Interface, your ActiveRowCount should increment the same.
Is it possible that maybe your CI code is inserting into a different RowSet than what you are doing online through the PIA?
I don't know if this terminology helps --
Online via PIA | Component Interface
RowSet = Collection
ActiveRowCount = Count
Row = Collection
Field = Property
Also be sure that your FieldChange is getting triggered after you insert the row. I am not sure how you are viewing the ActiveRowcount. If it is a message, I would assume that shows up in the message collection. The message collection will just queue the messages and you can check them at the end. So, what could happen is that your field change is getting triggered first and the message gets added to the collection. Then, you could insert the row. Then, you could check messages and see the count from before the row insert yet it looks like after the row insert. You might consider printing all your messages from the collection right before the row insert and deleting any pending messages.
If you would like to post some of your code, maybe we can help more. Hope that much helps.

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I am trying to get my head around declaring an object
as the interface type (I think this is right correct
me if I am wrong). Ok so I understand if I declare my
object reference as the interface I will only get the
methods of the interface defined in the objects
class..? ie
List myList = new ArrayList();I think any method particular to ArrayList will not
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But I dont actually understand wha is
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http://www.cisco.com/en/US/tech/tk543/tk545/technologies_tech_note09186a008010dd6a.shtml
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