The script uses an array of type NotesAgent, arbitrarily declared to be ten elements, to hold the agents that are disabled and owned by the current user.
Sub Click(Source As Button)
  Dim session As New NotesSession
  Dim db As NotesDatabase
  Dim agentArray( 1 To 10 ) As NotesAgent
  Dim count As Integer
  Dim r As String
  Set db = session.CurrentDatabase
  count = 0
  ' find agents owned by current user and disabled
  Forall a In db.Agents
    If ( a.Owner = session.UserName ) And _
    Not ( a.IsEnabled ) Then
      count = count + 1 
      Set agentArray( count ) = a
    End If
  End Forall
  r = Inputbox$( "You have " & count &  _
  " disabled agents. Delete them?" )
  If ( r = "yes" ) Or ( r = "y" ) Then
    ' go through each agent that's owned by current  
    ' user and disabled
    Forall b In agentArray
      Call b.Remove
    End Forall
  End If
End Sub