Create a check box bound to the Discontinued data field.
Select the required control and switch to the Expressions section in the Visual Studio property grid. Click the ellipsis button for the control's Visible property (you can find it under the BeforePrint event's category if you are using the ExpressionsAdvanced binding mode):
This invokes the Expression Editor where you can specify the required expression:
Use the Iif function to define the required condition. For example: