[support] $block['content'].= drupal_get_form('search_form', NULL, $keys, 'event'); problem

[bharani kumar]

Hi Friends


    $block['content'].= drupal_get_form('search_form', NULL, $keys,
'event');


i have used this code in my custom block,

I got the search box,

But it is not  searched anything,

drupal_get_form('search_form', NULL, $keys, 'event');


for this function, i have to supply any value ???

Any idea
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