I use exempel "Scheduler - Using RadToolTip"
How can I integrate/use my own database fields for example:
If apt.MyField.ToString() = "Ja" Then.....
Protected Overrides Sub OnPreRender(e As EventArgs)    MyBase.OnPreRender(e)    lblStartDate.Text = apt.Owner.UtcToDisplay(apt.Start).ToShortDateString    lblEndDate.Text = apt.Owner.UtcToDisplay(apt.[End]).ToShortDateString    lblRubrik.Text = apt.Subject.ToString()    lblBeskrivning.Text = apt.Description.ToString()    If apt.Description.ToString() = "" Then        hlVisa.NavigateUrl = "appointment.aspx?id=" & apt.ID.ToString()    End IfEnd Sub