NX9 Knowledge Fusion script to add values to expressions

[quicova]

Hello,

I'm new to Knowledge Fusion, I'm trying to create a .dfa script that will add some values from a surface or solid to expressions, so I can then export to excel.

Here is what I have so far:

DefClass: moment (%nx_application %ui_comp);

(Boolean) %on_solid?: false;
(String Parameter) %ask_name: "moment Of Inertia";
(string) %icon_name: "section_inertia";
(Integer) %edit_dialog: ug_invokeClassDialog(self;
(List Uncached) %onObjectHighlight: moment:;
(Boolean) %atTimeStamp?: false;

(child) UI_Select: {
class, %ui_comp_selection;
Many, False;
Label, "Select surface or solid to analyse";
Tooltip, "Select the Surface or Solid to analyse";
FilterTriple, {{ 70, 0, 35 },{ 70, 0, 36 }};
};

(Instance) objet: ug_adoptObject(nth(1,UI_Select:SelectedObjects);

## get centers and add to expressions ##

(child uncached) x: {
Class, ug_expression;
Name, "x";
Value, localX(objet:centroid;
};
(child uncached) x: {
Class, ug_expression;
Name, "x";
Value, localX(objet:centroid;
};
(child uncached) x: {
Class, ug_expression;
Name, "x";
Value, localX(objet:centroid;
};

Now I would like to also add surface are if the object selected is a face or volume if the object selected is an solid.
I tried:
(child uncached) area: {
Class, ug_expression;
Name, "area";
Value, area(objet:surface_area;
};
but didn't work and I have no idea how to add an if function in this language.

If anyone could help me out would be awesome
Thanks so much
regards

Francisco