'event' is computer jargon meaning: something that happens in a computer program.
Here's an example:
Option Compare Database
Private Sub Form_AfterUpdate()
Dim theDatabase As Database ' DEFINE A DATABASE VARIABLE
Set theDatabase = CurrentDb ' SET IT TO THIS HERE DATABASE
' EXECUTE AN SQL COMMAND TO ADD A RECORD TO LOGFILE
theDatabase.Execute "INSERT INTO tblLOGFILE (LogDesc) " _
& " VALUES ('" _
& PlanetName _
& "' & ' updated'" _
& ")"
theDatabase.Close ' CLOSE THE CONNECTION TO THE DATABASE
Set theDatabase = Nothing ' CLEAR OUT THE MEMORY USED BY IT
End Sub