BOP is the record of all transactions a country has with other countries/rest of the world. It combines all transactions for goods and services, capital and transfers. It isn't just the Net Export figure it is more encompassing than that. The net exports figure is your trade balance.
Whereas BOP states the sources of funds such as exports, as well as receipts from loans/investments and uses of funds such as imports and payments to loans/investments.
BOP includes three main categories: the current account, the capital account and the financial account. Net Exports (Exports- Imports) is a subset of the current account.