simple-location/options.php

<div class="wrap"
<?php screen_icon(); ?>
<h2>Simple Location Options</h2>

<form method="post" action="options.php">

<?php 
settings_fields( 'simple-location-options' );
?>

<a href="http://ipinfodb.com">IPInfoDB</a> API Key: <input id="simple-location-api-key" name="simple-location-api-key" type="text" value="<?php print get_option('simple-location-api-key'); ?>" size="70" />


<?php submit_button(); ?>
</form>
</div>