Create crystal report from run-time created Dataset

Hi,
I am trying to create a crystal report for my project. Anyway, I have found lots of example on the net about how to create crystal reports and display it on the aspx page. All of them have discussed about strongly typed dataset and crystal report.

But my requirement is different. The dataset will be created at runtime based on some parameters and will pick up data from multiple tables. And this dataset should be used to create the crystal report. The columns of the datset's datatable will be the same always.

How to achieve this ?

Thanks in advance...