Question : Excel VBA

Hi,

I want users to be able to enter three variables into a text box or form of some description on a spreadsheet and then press enter, after pressing enter VB runs following calculation

No of Shares      40000
Dividend Yield %      0.125
Desired Return Yield %      0.05

Calcualtion      
Dividend = (No of Shares * Dividend Yield)      
Sell at £ = (Dividend/Desired Yield)/ No Of Shares      

So after pressing the Calculate button, the user is left with the message

Sell at £ xyz

Can anyone suggest a method and code to use to run this in Excel

Thanks and Regards,
Seamus

Answer : Excel VBA

1:	$line=~ m/^.{6}\s+PERFORM\s+(?!varying)(\S+)($|\s|\./i