Worked at implementing the Extrude feature application needed to build a 3D model from a shape. Had some problems with the drawn shape that it was unselectable.
Added a tree list control on the modeling module that is registered at application startup. I could represent some of the data elements in the tree view. The algorithm needs some improvements to show user friendly info. Will finish this code and use it in the application, it is useful to monitor what happens with the data tree during the application usage.