'宣言 Public Overloads Function DateTimeFromPoint( _ ByVal point As Point, _ ByRef columnHeaderElement As Infragistics.Win.UltraWinSchedule.TimelineView.ColumnHeaderUIElement _ ) As Nullable(Of Date)
public Nullable<DateTime> DateTimeFromPoint( Point point, out Infragistics.Win.UltraWinSchedule.TimelineView.ColumnHeaderUIElement columnHeaderElement )