Writing a Macro in Excel to Import Data

Question

I am emailed an excel attachment that has a row of data that is updated daily. (for example,

A1 10/21/10 B1 10 C1 19 A2 10/22/10 B2 9 C2 4 A3 10/23/10.....

I need to create a macro, that when once the attachemnt is open from the email I can run the macro from another excel file that will copy the data for the current date and import it into my file that runs the macro on the row that has the same date listed. I have never created a macro, so any and all help would be greatly appreciated.