Identifies obsolete 16-bit integer variables.

Inspection type: CodeQualityIssues

Default severity: Hint


Modern processors are optimized for processing 32-bit integers; internally, a 16-bit integer is still stored as a 32-bit value. Unless code is interacting with APIs that require a 16-bit integer, a Long (32-bit integer) should be used instead


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.
  • ChangeIntegerToLong: Changes 16-bit (max value 32,767) Integer declarations to use 32-bit (max value 2,147,483,647‬) Long integer type instead.
  • 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.


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 rowCount As Integer
    rowCount = Sheet1.Rows.Count ' overflow: maximum 16-bit signed integer value is only 32,767 (2^15-1)!
End Sub

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