wordpress create widget in dashboard

add_widget.php

// Add a widget in WordPress Dashboard
function wpc_dashboard_widget_function(){
    // Entering the text between the quotes
    echo "<ul>
			<li>Release Date: March 2012</li>
			<li>Author: Aurelien Denis.</li>
			<li>Hosting provider: my own server</li>
		</ul>";
}

function wpc_add_dashboard_widgets(){
    wp_add_dashboard_widget('wp_dashboard_widget','Technical information','wpc_dashboard_widget_function');
}
add_action('wp_dashboard_setup','wpc_add_dashboard_widgets');