Connect to MySQL database from another host.

[medvegonok]

I am trying to connect to MySQL database at on host (DBhost) from another host (PROGRAMhost).

While I try to connect to the database at DBhost from DBhost itself the next is working fine for me:
mysql_connect("localhost","qdbname","dbpassword")

Now I am trying to find out what to use instead of localhost? I tried to replace localhost with host's url:port (I tried number of ports) but this is not working (even when I am connecting from DBhost itself). How can I find out what is the proper value to use instead of localhost?

[Banfa]

What are the locations of the 2 servers, are they on the same LAN?

The URL of the DBHost should work (I don't think a port is required) or alternatively the computer name or the IP Address (of the form 127.0.0.1 but with the right numbers obviously).