Hello,

maybe something like that:
function sTrSrf(){
var objs = moi.geometryDatabase.getSelectedObjects();
var objsSel = moi.geometryDatabase.createObjectList();

for ( var i = 0; i < objs.length; ++i )
{
objsSel.addObject(objs.item(i));
}

var factory = moi.command.createFactory( 'shrinktrimmedsrf' );
factory.setInput( 0, objs );
var xxx=factory.calculate();
factory.cancel();
moi.geometryDatabase.removeObjects(objs);
moi.geometryDatabase.addObjects(xxx);

xxx.item(0).selected=true;
}
sTrSrf();

Have a nice day
Karsten