Using Default Values Instead of Prompting
To run a report without any action on the part of the user, provide a default value for each parameter and select the Hidden check box in the Report Parameters smart panel.
Like the valid values list, default values can be queried or non-queried. A non-queried default value can be a static value or an expression.
A queried default value is a field value from a dataset. When using a query, the first returned row value is used as the parameter value.
Subreport Parameters
You can easily synchronize a subreport's data with that of the parent report by setting the Parameters property of the Subreport report item to the name of a Report Parameter in the report you are displaying in the Subreport report item, and then setting the Value to an expression pointing to a field or other object in the parent report.
For more information, see Passing Parameters.
Drillthrough Parameters
Drillthrough links to separate reports pass parameters via the Navigation page of the TextBox or Image smart panel. When you select Jump to report for the action, the parameters list is enabled. The name of the parameter you enter must exactly match the name of the parameter in the linked report, and it is case sensitive. You can pass a value from the current report to the parameter in the Value column of the list.
If a value is not supplied for an expected parameter in the linked report, or if the parameter names do not match, the linked report will not run.