How to change a header value dynamically(from report header) in a crystal report. Right now I am using parameter field for that. Basically what I am trying to do is, when user changes a date value in a calendar control, that value needs to get updated in the report header of a crystal report when the user hits the submit button. When the report loads first time, the parameter field value changes correctly. But once the report loaded into crystal report viewer, the parameter values which I am passing are not working(by pressing submit button). Can anyone help me to solve this problem. Thanks.