Public Overridable Function BoxLayoutEx (Optional LayoutMode As PjLayoutMode = (Microsoft.Office.Interop.MSProject.PjLayoutMode) -1, Optional LayoutScheme As PjLayoutScheme = (Microsoft.Office.Interop.MSProject.PjLayoutScheme) -1, Optional SummaryPrecedence As Object, Optional RowAlignment As PjVerticalAlignment = (Microsoft.Office.Interop.MSProject.PjVerticalAlignment) -1, Optional ColumnAlignment As PjAlignment = (Microsoft.Office.Interop.MSProject.PjAlignment) -1, Optional RowSpacing As Object, Optional ColumnSpacing As Object, Optional RowHeight As PjRowColSize = (Microsoft.Office.Interop.MSProject.PjRowColSize) -1, Optional ColumnWidth As PjRowColSize = (Microsoft.Office.Interop.MSProject.PjRowColSize) -1, Optional AdjustForPageBreaks As Object, Optional ShowSummaryTasks As Object, Optional ViewBackgroundColor As Object, Optional ViewBackgroundPattern As PjBackgroundPattern = (Microsoft.Office.Interop.MSProject.PjBackgroundPattern) -1, Optional ShowProgressMarks As Object, Optional ShowPageBreaks As Object, Optional ShowIDOnly As Object) As Boolean