VB.NET Language in a Nutshell, Second Edition

Name

Event Statement

Syntax

[accessmodifier] [Shadows] Event eventName [(arglist)] 
[Implements interfacename.interfaceeventname]

accessmodifier (optional; Keyword)

Can be one of Public, Private, Protected, Friend, and Protected Friend

Shadows (optional; Keyword)

Indicates that the event shadows any programming elements of the same name in a base class

eventName (required; String literal)

The name of the event

arglist is optional and has the following syntax:

[ByVal | ByRef] varname[( )] [As type]

ByVal (optional; Keyword)

The argument is passed by value; that is, a local copy of the variable is assigned the value of the argument.

ByRef (optional; Keyword)

The argument is passed by reference; that is, the local variable is simply a reference to the argument being passed. All changes made to the local variable are reflected in the calling argument. ByRef is the default method of passing variables.

varname (required; String literal)

The name of the local variable containing either the reference or value of the argument.

type (optional; Keyword)

The data type of the argument. It can be Byte, Boolean, Char, Short, Integer, Long, Single, Double, Decimal, Date, String, Object, or any user- defined type, object type, or data type defined in the BCL.

Implements interfacename.interfaceeventname (optional)

Indicates that the event implements a particular event named interfaceeventname in the interface named interfacename.

Description

Defines a custom event that the object can raise at any time ...