The OpenDocument command opens an Inventor document and returns a handle.

$\mathrm{with}\left(\mathrm{CAD}\left[\mathrm{Inventor}\right]\right)\:$

$\mathrm{OpenConnection}\left(\right)\:$

$\mathrm{doc}≔\mathrm{OpenDocument}\left(''c:/mypart.ipt''\right)$

$\mathrm{doc}≔0$

$\mathrm{CloseDocument}\left(\mathrm{doc}\right)$

$\mathrm{CloseConnection}\left(\right)\:$