Well, here's the issue. It is definitely the WaitWindow that is causing the beep. I know this because if I remove the calls to WaitWindow it works ok. However, we call WaitWindow in utility class but, if the code is the form itself (as in Edhy's example), then no problems, e.g.

This doesn't beep:

    Private Sub PopulateGrids()

        Me.WaitWindow1.Message = "Please Wait. Refreshing Data.."

        Me.BoOTA1.RefreshBO()
        Me.BoOTY1.RefreshBO()

        Me.WaitWindow1.HideWaitWindow()

    End Sub

But this does:

    Private Sub PopulateGrids()

        clsFU.ShowTheWaitWindow(Me.WaitWindow1)

        Me.BoOTA1.RefreshBO()
        Me.BoOTY1.RefreshBO()

        clsFU.HideTheWaitWindow(Me.WaitWindow1)

    End Sub

The utility class code is:

#Region " Handle Wait Windows "

    Public Shared Sub ShowTheWaitWindow(ByVal WaitWindow As MicroFour.StrataFrame.Messaging.WaitWindow)
        ' Show we are doing something using default mesages
        ShowTheWaitWindow(WaitWindow, "PleaseWait", "RefreshingData")

    End Sub

    Public Shared Sub ShowTheWaitWindow(ByVal WaitWindow As MicroFour.StrataFrame.Messaging.WaitWindow, _
                                        ByVal WaitMessageLocKey As String, _
                                        ByVal ReasonMessageLocKey As String)
        ' Show we are doing something
        System.Windows.Forms.Cursor.Current = Cursors.WaitCursor
        Waitwindow.ShowWaitWindow(clsLOC.Localise(WaitMessageLocKey), _
                                  clsLOC.Localise(ReasonMessageLocKey), _
                                  MicroFour.StrataFrame.Messaging.MessagingCardinalPosition.Center)
    End Sub

    Public Shared Sub HideTheWaitWindow(ByVal WaitWindow As MicroFour.StrataFrame.Messaging.WaitWindow)
        ' The refresh is over - hide the wait window
        System.Windows.Forms.Cursor.Current = Cursors.Default
        Waitwindow.HideWaitWindow()
    End Sub

#End Region

We use DevExpress for our UI - could this be influencing things in anyway?

Cheers, Peter

Depending on the context you are using to call it, it might cause an error or notification bell to fire. For example, if you are calling it from a combo and in the process are causing an unhandled keypress, it might beep at you.

I'd try creating a new solution call the wait window from a button on a blank form to remove everything else from the equation. If it still beeps there let us know and we'll take a closer look, but it shouldn't .

Me.Cursor = Cursors.WaitCursor
Me.WaitWindow1.Message = "Please wait, Creating Invoice Number " & Me.BizServiceCalls1.InvoiceNumber & "..."

Of course there is more code prior to ShowMessage and HideWaitwindow.

Well that's interesting. Your comment made me think that, maybe, I was triggering something else in my environment however when I look at our library code for showing / hiding the wait window the only thing extra it does is change the form's Cursor.Current property which doesn't cause a beep.

I guess I will await SF's confirmation that the wait window doesn't beep then delve a bit deeper into my environment.

Cheers, Peter

I use the Wait Window control and mine does not sound any beep.

Is there any way of turning off the Wait Window beep - its drives me nuts!!

Cheers, Peter