PublicControlFieldAccess

Flags MSForms controls being accessed from outside the UserForm that contains them.

New This feature is currently only available in pre-release builds (or the xmldoc asset doesn’t yet exist on main!).

Inspection type: LanguageOpportunities

Default severity: Hint

Reasoning

MSForms exposes UserForm controls as public fields; accessing these fields outside the UserForm class breaks encapsulation and couples the application logic with specific form controls rather than the data they hold. For a more object-oriented approach and code that can be unit-tested, consider encapsulating the desired values into their own 'model' class, making event handlers in the form manipulate these 'model' properties, then have the code that displayed the form query this encapsulated state as needed

Quick-Fixes

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.
  • 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.

Examples

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:

Module1

Option Explicit
Public Sub Test()
    With New UserForm1
        .Show
        If .ExportPathBox.Text <> vbNullString Then
            MsgBox .FileNameBox.Text
        End If
    End With
End Sub

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