Can we hide some parameters

There will be a pararmeters panels when we browse reports.
The user can modify the parameters there.
But there are some parameters I do not want the usrs to modify.
How can I hide these parameters of restrict user to modify?In the report manager go to the report properties and then to the Parameters
section. Specify a default value for the parameter and then delete the prompt
string (DO NOT uncheck the "Prompt user" check box)
Of course, the parameter value will always be the same, no matter which user
runs the report or what he/she does.
I hope this helps.
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