How to find out if the part is a metric or inch part in toolkit?

[sa-8]

I need to know if the part is mm or inch as I need to set different text heights for each case. Can you please help me find the api to do this?

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[TomasLoun]

ProUnitsystem unit_system;

ProUnititem unit;

ProMdlPrincipalunitsystemGet(currentModel, &unit_system);

ProUnitsystemUnitGet(&unit_system, PRO_UNITTYPE_LENGTH, &unit);

unit.name is holding then "in" or "mm" or other values...