An alternative way is using the load-{$page}
hook.
Example:
add_action('load-edit.php', 'my_edit_notice''maybe_edit_notice'); // only on edit.php paged
function maybe_edit_notice() {
// some example notices based on the get variables
// the url should be something htt://example.com/wp-admin/edit.php?done=1&error=1
if ( isset($_GET['done']) ) {
$message = isset($_GET['error']) ? 'There was an error.' : 'Everithing ok.';
$class = isset($_GET['error']) ? 'error' : 'updated';
global $my_notice_args;
$my_notice_args = compact('message', 'class');
add_action('admin_notices', 'print_my_notice');
}
}
function print_my_notice() {
global $my_notice_args;
if ( ! empty($my_notice_args) ) {
printf('<div class="%s"><p>%s</p></div>', $my_args_notice['class'], $my_args_notice['class']$my_args_notice['message']);
}
}
See 'admin_notices' hook docs on Codex