VS 2012 SQL server online question

Hi, I am new at VS SQL and would like to know how to create a SQL server that can be accessed online (a store and retrieve point)

I tried to search for tutorials and I wasn't successful. I kept on finding (how to create an SQL server, but I don't know how to use it as well as if it is online or not? (can all SQL servers be retrieved online)

So my point is.. can someone please help to a link or show me the right path to begin a SQL server online database.

What I like to achieve is to store X online and retrieve it from any computer with internet (as well as the VS program) and "Load" it into (Example X = textbox1.text) and save the textbox1.text as X online.

Example : A message system that sends and retrieves messages (from user 1 to the server then to user 2)

I hope someone can please help me... have tried to achieve this along time ago but I wasn't successful.

If there is a better way (besides SQL server database to do the same objective please let me know) I was told to create a SQL - because VS gives the ability.

Please, please help me..(I have quit an experience with VB Express Edition 2008 basic stuff) but have NO knowledge on SQL/databases.

Please and Thanks you!