Returns the width - in points (1/72 of an inch) - of the specified column. When converted to character widths, this must be a value that is between 0 - 255.

 public double GetColumnWidth(int columnIndex)
Public Function GetColumnWidth(ByVal columnIndex As Integer) As Double

The column's 0-based index, relative to the first column in the Area.

The width of the column, in points.

double colWidth = a.GetColumnWidth(0);
Dim colWidth As Double = a.GetColumnWidth(0)