Getting Field Name Via A Calculation

Hi,

I have a cross tab query that has field names 6, 7, 8, 9, 10 representing months and a relevance date field with a date.

I have a form and from that form i need to get the value of the last three months from a relevance date field.

I.e relevance may be 01/10/2005 so i would need 3 labels, (labels are already made, but there source needs to be) 10, 9, 8. But the next row may have a relevance date of 01/08/2005 in which case it would be 8,7,6.

Any ideas on how i can do this.

Thanks Adam