Develop stresses calculation adds-in based on Excel & Solidworks

We want to develop an application on Solidworks to do stresses calculation with mathmatical methods, not FEA analytical method.

The formulas or experimental data for stress calculation are based on the standard of ASME VIII div.1.

The stress calculation is proceeded in Excel but its input should be auto-retrieved from Solidworks model or interactively picked from SW models.

Of course, its stress evaluation reports are completed in Excel.

Typical components for our products are skids, nozzles, lift lugs, and so on.

Any suggestions will be greatly appreciated.

SolidworksApi macros