can anyone tell me if its possible to display a Message box or Alert in ssRS with custom code? Basically, i want to compare the value of two parameter and based on certain condition i want to display an Alert. e.g. There are two param of a reports; "Start Date" and "End Date". Is it possible to check the date before excuting the reports. I want to check that "Start date" must be less than equal to "End Date". How can i do this ssrs?