Hi Ruben,
From the COM interface, the only way to determine if a component variable for any concept is max/min sized is to query the bounds and dimension results for each variable. Form there you can include logic in your script to detect hitting the max/min bound.
From the sizing form ribbon, you can export a dimension spreadsheet per assembly which will bold a dimension result if it equals a max/min bound. This however is not exposed to the COM interface.
Regards,
Brent