Thanks Sachin,
Yes, it is the correct feature (polygon). But it contains many other features (polygons). So, I subtracted it the areas of sub features, but the final result doesn't equal the value: Shape.Area.
How can I get the area of that feature (not include area of sub features) ?
Please see my image (the current feature is green)
[ATTACH=CONFIG]31541[/ATTACH]
Thanks and regards,
Tai