The Is license available command lets you find out the availability of a plug-in. It is useful, for instance, for displaying or hiding functions requiring the presence of a plug-in.

The Is license available command can be used in three different ways:

• The license parameter is omitted: in this case, the command returns False if the 4D application is in demonstration mode.
• You pass one of the constants of the “Is License Available” theme in the license parameter:
  

  Constant	Type	Value
  4D Client SOAP license	Longint	808465465
  4D Client Web license	Longint	808465209
  4D for OCI license	Longint	808465208
  4D ODBC Pro license	Longint	808464946
  4D REST Test license	Longint	808465719
  4D SOAP license	Longint	808465464
  4D View license	Longint	808465207
  4D Web license	Longint	808464945
  4D Write license	Longint	808464697

  
  In this case, the command returns True if the corresponding plug-in has a license available. The command takes into account any licenses attributed in Design mode or via the SET PLUGIN ACCESS command.
  Is license available returns False if the plug-in is operating in demo mode.
• You pass the ID number of the plug-in “4BNX” resource directly in the license parameter. In this case, the command behaves as described above.