In the
"Field
Explorer" view, right-click
Parameters, and then click
New.
Enter a name for the
parameter, and then click
Enter.
In the
"Properties" view, select the
appropriate
Type from the list, and enter prompting text.
Set
Allow Custom
Values to True.
Note: This property is
set to True automatically unless you have specified a list of values. When you
specify a list of values, you can choose to disallow customs values by setting
the property to False.
Now, when you refresh the data on the
Preview tab, you can specify parameter values in addition to those displayed in
the dialog box.