SAP ABAP: How to find a BAPI for Particular transaction?

While doing updates on tables there are bapi's avalaible for almost every table.

For example we want to create some material in the material master.

-First execute transaction: MM01 to create the material master record.

-Go to: <<< System >> <<< Status >>>

- Then double click on the field transaction

- In the next screen double click on Package

For Full Story....Clikc HERE

Also find the detials in the same above link ... How can this BAPI update Custom fields?