public CellRange GroupByColumns(
	int firstColumn,
	int lastColumn,
	bool isCollapsed
)

Public Function GroupByColumns ( 
	firstColumn As Integer,
	lastColumn As Integer,
	isCollapsed As Boolean
) As CellRange

public:
CellRange^ GroupByColumns(
	int firstColumn, 
	int lastColumn, 
	bool isCollapsed
)

member GroupByColumns : 
        firstColumn : int * 
        lastColumn : int * 
        isCollapsed : bool -> CellRange