Dear Claus,
Thank you for your reply.
I cannot find where the typo you speak of, is.
I did not have the 'Click()' in the first line:

Private Sub cmd Begin_click()

in lower case, I had it in upper case in my program, ie:

Private Sub cmd Begin_click()

All the same I copied and pasted the code you gave into my Excell VBasic coding page, but upon pressing the button 'Begin' in the Excell Spreadsheet page, nothing happened.

Could you tell me exactly what the typo you refer to was ?