Customizing the Crystal Report at run time

Question

Dear all,

I need the solution for my problem.

I have two forms in c#.net windows application. One form contains crystal report viewer and the another form contains Customizing forms. the Customizing form contains Report Title Text box,Report Sub title Text box.
Whatever i am going to change this form they should be updated in report viewer.
Example The Report viewer contains Report Title Parameter.
The Customizing form contains Report Title Text Box. Suppose i am going to enter "Test" in the Text box then press "OK" button the Report viewer form Title Should be change in "Test". Kindly help me to solve this problem