Flags identifiers that use [Systems] Hungarian Notation prefixes.

Inspection type: MaintainabilityAndReadabilityIssues

Default severity: Suggestion


Systems Hungarian (encoding data types in variable names) stemmed from a misunderstanding of what its inventor meant when they described that prefixes identified the "kind" of variable in a naming scheme dubbed Apps Hungarian. Modern naming conventions in all programming languages heavily discourage the use of Systems Hungarian prefixes


The following quick-fixes are available for this inspection:

  • IgnoreOnce: Adds an '@Ignore annotation to ignore a specific inspection result. Applicable to all inspections whose results can be annotated in a module.
  • AddIdentifierToWhiteList: Adds an identifier or Hungarian Notation prefix to a list of white-listed identifiers and prefixes in Rubberduck's inspection settings.
  • IgnoreInModule: Adds an '@IgnoreModule annotation to ignore a inspection results for a specific inspection inside a whole module. Applicable to all inspections whose results can be annotated in a module.
  • RenameDeclaration: Prompts for a new name, renames a declaration accordingly, and updates all usages.


Each example is a self-contained MCVE showing the feature in a single specific scenario.

Standard Module
Named Module1 by default, these are general-purpose standard procedural modules.
Class Module
Named Class1 by default, these modules define the default interface for an object of that type.
Predeclared Class
A class module with its VB_PredeclaredId attribute set to True (with or without a @PredeclaredId annotation).
Interface Module
Abstract interfaces are class modules (with or without an @Interface annotation) whose default interface is not a class type intended to be instantiated.
UserForm Module
A predeclared class with a design-time visual designer using the MSForms UI framework.
Document Module
Owned by the host application, these class modules belong to the host document and may handle various events fired by the host application.

The following code should trigger this inspection:


Public Sub DoSomething()
    Dim bFoo As Boolean, blnFoo As Boolean
    Dim intBar As Long ' which is correct? the int or the Long?
End Sub
Private Function fnlngGetFoo() As Long
    fnlngGetFoo = 42
End Function

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