Data Import script parameters

Hi.

I've created a data import script to import new employees from HR database (the script reads data from SQL table). Declaration of import function is: Public Sub MyDataImport (ByVal dfImport As DataFileImport). There is one function parameter expected: DataFileImport. Can someone explain me more details about this parameter? I've also created a new process and I have used Script Component (ScriptExec) to execute script. At this step I set parameter ScriptName to "MyDataImport". But I don't know what to set as parameter dfImport?

Any idea or example would be appreciated!

Thanks.

Evgen