Report Solution Patterns and Recipes - Professional SQL Server 2005 Reporting Services - page 321

Figure 7-66 shows the finished report; a list of products in a single row table, with a check box displayed
in the first column.
Figure 7-66
When the user clicks an unchecked box, a check appears and when a checked item is clicked, it is
unchecked. This is a simple concept, but there is no check box item in the Report Designer Toolbox. As
you can see in Figure 7-67, each check box (actually an image) is a navigation item. Clicking a checked or
unchecked image cause the report to post back to itself, passing the selected ProductID to be added to or
removed from a list of selected IDs stored in a report parameter.
Figure 7-67