Using identifier [, identifier [, ...] ]

identifier: The name of the Namespace that you want to use.

The Using command allows all symbols from a given namespace to be accessed without the namespace's name prefix. Unlike C++ but like C#, the Namespace keyword is not needed after Using, because individual symbols cannot be inherited from a namespace. Inheriting a whole namespace can save typing, but sometimes some meaning of the code can be lost, and conflicts with other symbols could be created.

Namespace Sample
    Type T
        x As Integer
    End Type
End Namespace

'' Just using the name T would not find the symbol,
'' because it is inside a namespace.
Dim SomeVariable As Sample.T

'' Now the whole namespace has been inherited into
'' the global namespace.
Using Sample

'' This statement is valid now, since T exists
'' without the "Sample." prefix.
Dim OtherVariable As T 

• QB had the Using keyword, but for other purposes. Namespaces did not exist in QB.
  
  

• Print Using
  
• Palette Using
  
• Namespace