note 50266 added to function.setcookie

Hi, setcookie(); How could you guide a user to set a cookie to have not such error. Warning: Cannot modify header information - headers already sent by (output started at c:\Inetpub\wwwroot\admin\mainadmin.php:8) in c:\Inetpub\wwwroot\admin\mainadmin.php on line 10 ---- Manual Page -- http://www.php.net/manual/en/function.setcookie.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+50266 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+50266&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+50266&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+50266&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+50266&report=yes&reason=useless Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+50266&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+50266&report=yes Search -- http://master.php.net/manage/user-notes.php