you should type IPAddress of host or host Name in "Server Host" field of MySQL Administrator,your username in "uaername" field and your password in "Password" field. if you couldn't connect, you may not have privileges to connect to that host.
you should have a username and password on the MySQL Server and also the hostname specified for you (you username) should be your computers name (or IP) OR '%'(which means any IPs).
you can also run CMD (command prompt) and type "mysql -h HOSTNAME -u USERNAME -pPASSWORD " in it and press enter.
but to connect via
vb.Net to MySQL you can download connector/Net from MySQL AB WebSite (
http://www.MySQL.com), and use it to connect your app. to MySQL Server.
Chagh