How to Set Appointment BackColor after a Search

I'm able to find an appointment from a search box using the following code.

    Private Sub FindAppointment()
        For Each app As Appointment In SalesOrdersSchedule.Appointments
            If app.Subject.Contains(searchTextBox.Text) Then
                SalesOrdersSchedule.ActiveView.StartDate = app.Start
                SalesOrdersSchedule.SchedulerElement.InvalidateMeasure(True)
                SchedulerUIHelper.BringAppointmentIntoView(app, SalesOrdersSchedule)
                UcSalesOrderLine1.RefNumber = searchTextBox.Text
                UcSalesOrderLine1.lblHeader.Text = GridHeaderHTMLBegin & $"Sales Order Items For {app.Summary} ShipDate: {app.Description}" & GridHeaderHTMLEnd
                UcSalesOrderLine1.LoadGrid()
                Exit For
            End If
        Next
    End Sub

The BringAppointmentIntoView works just fine - but I need the appointment that has been found to change color so the user can find it amongst all of the other appointments showing for that week.

Is there a way I can change the back color or otherwise highlight the appointment and if so, how can I reset it when the user performs a search for another appointment?