Need a way to identify centroid within a shape

Hi

I need what could be call a XFM version of the Topology Tool called "Associate Linkages"

I have some XFM based centoids with attributes.

Then with the Topology tool "Create Shapes" I create all the complex shapes and there is nice areas on each shape feature.

Basically I then just need to transfer the area value from the shape feature  to an attibute on the centoid within the shape.

But how do I find the connection Shape->centroid 

This is all going to end up in a vba application, so programming is not a problem -but jumping to MapManager will is not so desirable.

Erik Wirring