Appendix D : Subroutine and Function Declarations

This appendix provides information about subroutine, function, and generic declarations. A property procedure includes a subroutine and function pair, so they are also described here.

Subroutines

The syntax for writing a subroutine is as follows:

  [attribute_list] [interitance_mode] [accessibility] Sub subroutine_name [(parameters)] [ Implements interface.procedure ]     [ statements ] End Sub 

The inheritance_mode can be one of the following values: Overloads, Overrides, Overridable, NotOverridable, MustOverride, Shadows, or Shared. These values determine how a subroutine declared within a class inherits from the parent class or how it allows inheritance in derived classes.

The accessibility clause can take one of the following values: Public, Protected, Friend, Protected Friend, or Private. These values determine which pieces of code can invoke the subroutine.