set_column_width
Specifies the width of a column or range of columns.
Call:
excel_request("set_column_width", string sdiapazon, double width);
Here: sdiapazon is a text value describing the range of columns. For example: "B:B" - means column B. If you write "B:D" then the width will be set for columns B,C and D.
width - column width.
Example.
Set column B width to 18.86:
excel_request("set_column_width","B:B",18.86);