Widening

Indicates that a conversion operator (CType) converts a class or structure to a type that can hold all possible values of the original class or structure.

Converting with the Widening Keyword

The conversion procedure must specify Public Shared in addition to Widening.

Widening conversions always succeed at run time and never incur data loss. Examples are Single to Double, Char to String, and a derived type to its base type. This last conversion is widening because the derived type contains all the members of the base type and thus is an instance of the base type.

The consuming code does not have to use CType for widening conversions, even if Option Strict is On.

The Widening keyword can be used in this context:

Operator Statement

For example definitions of widening and narrowing conversion operators, see How to: Define a Conversion Operator.

See Also

Tasks

How to: Define an Operator

How to: Define a Conversion Operator

Concepts

Widening and Narrowing Conversions

Reference

Operator Statement

Narrowing

CType Function

Option Strict Statement

Change History

Date	History	Reason
August 2008	Added information about where to find examples.	Customer feedback.