iOS Question Record audio file on iOS

Private recorder As AudioRecorder 'iMedia library


Sub btnRecord_Click
    Try
        pg.ResignFocus
        If File.Exists(File.DirDocuments,VoiceMessageFileName)=True Then
           
            Dim sf As Object = XUI.Msgbox2Async("Do you want to record audio file again?", "HCMS", "Yes", "", "No", Null)
            Wait For (sf) Msgbox_Result (Result As Int)
           
            If Result <> XUI.DialogResponse_Positive Then              
                Return
            End If
                       
            Dim Del As Boolean
            Del=File.Delete(File.DirDocuments,VoiceMessageFileName)          
            Log("File " & VoiceMessageFileName & " deleted " & Del & " before recording")          
        End If
       
        Buttons("Record")
        StartRecording
   
    Catch
        Log("btnRecord_Click " &  LastException.description)      
    End Try
End Sub

Sub StartRecording
    Try
       

        recorder.Initialize(AudioFileDir,VoiceMessageFileName, 44100, True, 16, False)

        lblTimer.Text=""
        recordingStart = DateTime.Now
        timer2.Enabled=True
        Timer2_Tick
        recorder.Record
        Log("StartRecording")
   
    Catch
        Log("StartRecording " & LastException.description)
    End Try
   
End Sub

Sub StopRecording
   
    Try
        timer2.Enabled=False
        recorder.Stop
        Log("StopRecording")
       
    Catch
        Log("StopRecording " & LastException.description)
    End Try
   
End Sub