Information functions
CELL(row,column[,raw]) returns the contents of the cell with coordinates row and column.
CHIGH() Highest column number used in the spreadsheet
COLUMN([cell]) Returns the column number of a cell
COLUMNDEFAULT(column) Returns the current default value for a column
EVAL(expression[,showerror]) Evaluates an expression
INFO(id) Returns computer and system information
RHIGH() Highest row number used in the spreadsheet
ROW([cell]) Returns the row number of a cell