VBC09329 — Object module needs to implement all members of its interface

Severity: Error · Family: VBC (static semantics / abstract syntax tree) · Source metadata: VBCompileErrorInfo

A class module that implements an interface does not declare the implemented name that corresponds to one of the interface's public variables or methods.

MS-VBAL §5.2.4.2 Implements Directive requires an implemented name declaration, named InterfaceName_MemberName, for each public method of the interface class, and for each public variable the property declarations its declared type calls for.

This code is raised by ImplementsSemantics. The verbose detail names the member and the declaration the module is missing.

How it is raised

Interface member	What the module must declare
`Public Sub Draw()`	`Sub IShape_Draw()`
`Public Function Area() As Double`	`Function IShape_Area() As Double`
`Public Property Get`, `Let` or `Set`	The same accessor, with the same name prefix
A public variable that is a `Variant`	A `Property Get`, a `Property Let` and a `Property Set`
A public variable that is an `Object` or a class	A `Property Get` and a `Property Set`
A public variable of any other type	A `Property Get` and a `Property Let`

Notes

A Private member of the interface is not part of what is implemented, and is not required. A member the module does declare, but wrongly, is not reported as missing: what is wrong with it is VBC09330.

The Class interface that every class module implements (RD-VBAL §5.3.1.10) requires nothing: each of its members has an implementation of its own.

Table of Contents

VBC09329 — Object module needs to implement all members of its interface

How it is raised

Notes

See also