How to give permission to any host for root user of MySQL ?

Setting permission to any host on Windows

Connect to server and run following commands : 
C:\Program Files\MySQL\MySQL Server 5.0\bin>mysql -u root -p
Enter password: ****
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 15
Server version: 5.0.51a-community-nt MySQL Community Edition (GPL)
Type 'help;' or '\h' for help. Type '\c' to clear the buffer.

mysql> use mysql
Database changed

mysql> GRANT ALL ON *.* to root@'10.239.199.57' IDENTIFIED BY 'root';
Query OK, 0 rows affected (0.00 sec)

mysql> FLUSH PRIVILEGES;
Query OK, 0 rows affected (0.00 sec)