4In carrying out his duties and in exercising his powers under this Act or under any other Act relating to insurance, the Superintendent may require and may take and receive affidavits, statutory declarations and depositions, and may examine witnesses upon oath; and he has the same power to summon persons to attend as witnesses, to enforce their attendance, to compel them to produce books, documents, accounts, records and things, and to give evidence as any court has in civil cases.