dynamically creating crystal reports

[raghava]

hi
I need to design a tool such that................
user can place the fields from the available list on the report as he wish.
anybody pls suggest how to generate a crystal reporting tool that takes the input from the user selection and displays the relevant report dynamically.

For Ex:

1.EmpId
2.EmpName
3.EmpDesig
4.EmpSal
5.EmpPhoneNO
6.EmpEmailId

if user selects EmpName, and EmpDesig at run time

The Report should view as below

SNo EmpName EmpDesig

1. Satish softEng
2. Raghava Sr.Soft Eng