Using (Namespaces)

Brings namespace symbols into the current scope

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

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

Description
   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.

   Using is allowed in namespaces and procedures only (not in type or union 
   or enum declarations).

   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.

Example
   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 

Version
   * Before fbc 1.09.0, if there is duplicated symbol in the global 
     namespace (unnamed namespace), access to local symbol is captured by 
     duplicated global symbol (in that case, full prefixing is required to 
     access local symbol).

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

See also
   * Print Using
   * ? Using
   * Palette Using
   * Namespace

