put code into the on_open event of 250 workbooks

[Joe Heym]

I need to add the same 4 lines of code into the on open event of 250 different workbooks. Short of copy and paste this in to each one is there a quicker way? I would like a method that the user of each workbook can trigger to add these lines in.
Any thoughts would be much appreciated

[Norie]

Check this http://www.cpearson.com/excel/vbe.htm..

[Joe Heym]

Thanks this has really helped me