Displaying second parameter based on first parameter

Dear Developers,
In the parameter form or reports, I want to pass value selected
in the first parameter to the second parameter
ie. based on the first parameter selected, I would like the
query written in the second parameter for
displaying list to display only those values that are associated
with the first parameter.
How can I do this?
I do not want to call report from form with preselected
parameters.
Awaiting speedy reply
Gaurav

You can't do this in Reports. You need to do it in Forms

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