Set Family Parameter in instance

[thannaingoo.api]

Dear All,

I am trying to place a generic family into wall.

How should I set the parameter in family before insert into wall?

Should I set the familySymbol?

 FamilyInstance instance = doc.Create.NewFamilyInstance(face, location, refDir, familySymbol);

Thanks Advance,

Naing Oo

[thannaingoo.api]

Answer Found. 

FamilyInstance instance = doc.Create.NewFamilyInstance(f, intersection, refDir, familySymbol);                                  

                                    foreach (Parameter p in instance.Parameters)
                                    {
                                        if (p.Definition.Name == "Depth")
                                        {
                                            p.Set(ww.Width * 1.1);
                                        }
                                        if (p.Definition.Name == "h")
                                        {
                                            p.Set(DuctHeight + DuctClearance);
                                        }
                                        if (p.Definition.Name == "b")
                                        {
                                            p.Set(DuctWidth + DuctClearance);
                                        }
                                    }