Dynamic Sorting

Question

Is it possible to let users re-sort data in a Crystal Report by just clicking on a column heading? 
For example the default sort is by name . . .
Name                 Zip
Jane Doe           60999
Sue Smith          60001
but the user re-sorts by zip by clicking the zip heading/column . . .
Name                 Zip
Sue Smith          60001
Jane Doe           60999
If possible please advise how to construct.  Your help is appreciated.

Answer 1

I created a prompt sort option for my reports, which allows you to sort by none or any number of fields on the report, it is not static.
1. Find the total number of sorts you will have for the report (in my case, 8).
2. Create a formula for EACH sort i.e. "Sort Group 1", "Sort Group 2", etc
3. I then created a prompt called "Sort Option" - Multiple values, optional (CR 2008), Number. I assigned 1 - 8 with descriptions of my fields I wanted to sort by.
4. For "Sort Group 1" I used this formula:
numbervar array sort;
redim sort [8];
local numbervar i;
for i := 1 to 8 step 1 do
      sort<i> = i;
local numbervar h;
if (hasvalue({?Sort Option}) then
for h := 1 to ubound({?Sort Option}) step 1 do 
     sort[h] := {?Sort Option)[h];
select sort[1]
case 1: {xxx.Customer}
case 2: totext({xxx.sale_Date})
etc etc etc
5.  Use this formula for EACH 'Sort Group X" formula, and simply change the "select sort[x]" as needed.
6. Assign a group to each "Sort Group number, suppressing headers and footers as needed. 
This will allow you to select on your parameter, in order, the sorting that you want.  The sorts will cascade to whatever you select, and in the order you select them.
HTH
Chad