connection database from form to host

Here you have a lot of connection string samples for several database servers: http://www.connectionstrings.com/[^]. Choose the proper one.
But be aware of followings:
- It is unlikely, that a provider will keep open the tcp ports necessary for a database connection to be accessible from internet. It is more likely, that you will be provided the connection string you can use from "inside", and you will not be able to pass the boundaries of that provider - in neither direction.
- Integrated authentication methods can not be used over internet, only in domain or local environment, thus you will need a username and a password