After you install put this widget box on your sidebar or wherever you insert the following at the top of your code.
require( '/home/my/absolute/path/wp-load.php' );
Here is a simple example which would output something along the lines of : “Hello World Mr facade”.
IMPORTANT: Remember to change the absolute path to the one for YOUR server.
<?php require( '/home/my/absolute/path/wp-load.php' ); echo "hello world Mr "; $current_user = wp_get_current_user(); echo $current_user->display_name; ?>
WordPress Codex (get current user) : http://codex.wordpress.org/Function_Reference/wp_get_current_user