My requirement is something like this, I want to have a label, textbox and
button, on clicking the button I will open a page and the page returns a some
value which should be populted in the textbox. But we don't have control on
report parameter area of a report.

As per my understadning from your reply is I need to have a aspx page with
my own parameters and a reportviewer control pass these parameters with the
URL to the report. (I'm ok with this answer).

Please confirm me that we cann't add our own controls on the report
parameter area.

(We don't want to have a dropdownlist incase the items cross's more then
100. In this case we add a text box and a button on the report parameter
area. Onclicking the button I will open a search page in a popup window).
Search page contains all search fields and a grid. Selecting on a particular
row on the grid I need to pass the value to the textbox of the report).

Thanks

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