Different ways to declare VB variables?

Question

I'm new to VB.NET programming. What I'm confused about is the different ways one can declare a variable. Would someone please explain the difference between the two declarations below?

Dim sqlcommand As MySqlDataAdapter = New MySqlDataAdapter(sql, db)

And:

Dim anotherSqlcommand As New MySqlDataAdapter(sql, db)

Answer 1

There is no difference.

Sometimes you want to use the first method though if you want to take advantage of interfaces...

Dim myList As IList(Of Something) = New List(Of Something)

Instead of being restricted to List(Of Something)

Dim myList As New List(Of Something)

Answer 2

There's actually no difference between those two but if you need to get an object from another function you have to create it this way:

Dim sqlcommand As MySqlDataAdapter = CreateSqlDataAdapter(sql, db)

and you can't put new in there.