Classic Visual Basic

Product and dialect

Capture the producing product, version and platform with the evidence and confidence behind each identification.

1. Which project metadata, binary metadata or original tooling identifies the Visual Basic release and platform? provenance
2. What evidence distinguishes this artefact from VBA, VBScript and Visual Basic .NET? boundary

Project membership and output

Record the declared output type, startup object, project membership and any project-group relationships.

1. What output type and startup object does the project declare, and are they valid for the identified release? definition
2. Which modules, forms, classes and resources are referenced but absent or available only in another project? measurement

Designer resource integrity

Capture form definitions, associated binary resources, control arrays and required custom controls where present.

1. Which forms or user controls depend on associated binary resources, and are those resources present? measurement
2. Which controls, control-array indices or persisted properties must be preserved for the designer and event bindings to remain usable? boundary

Event and instance semantics

Identify consequential event ordering, form default-instance use, object lifetime and re-entrancy assumptions.

1. How does the startup object reach the required workflow through form, control or component events? definition
2. Where could default form instances, DoEvents, timers or callbacks expose partially updated state? boundary
3. Which event sequences must be exercised to validate a proposed change? action

Implicit value behaviour

Capture relevant use of Variant, Empty, Null, Nothing, default members, argument passing and array bounds.

1. Which paths depend on Variant coercion or distinctions among Empty, Null and Nothing? definition
2. Where do default members, ByRef arguments or array-bound assumptions affect externally observable results? boundary

Recovery and representation

Record On Error handling and assumptions at file, database and native API boundaries.

1. Which On Error and Resume paths suppress, recover from or propagate failures, and how is Err inspected? definition
2. Which file layouts, database providers or Declare signatures depend on specific string encodings, numeric widths or record layouts? boundary
3. What failure and round-trip examples would detect a semantic regression? action

Component resolution

Record referenced type libraries, ActiveX controls and dynamically activated classes, including their resolution evidence.

1. Which dependencies are declared as references or controls, and which are activated through CreateObject or GetObject? definition
2. Which component identities, versions, registrations or design-time licences are required in the tested environment? measurement

Compatibility baseline

Record exposed classes, members and events alongside project compatibility settings and any baseline binary.

1. What compatibility setting and baseline binary govern the component build, where supported by this release? provenance
2. Which existing clients rely on the exposed interfaces, activation model or events? boundary
3. What interface comparison and client execution checks are required before replacing the deployed component? action

Reproducible environment

Record the compiler, service level, compilation settings, controls, runtime files and installation steps needed for a named environment.

1. Which toolchain version, compilation mode, conditional compilation constants and dependency versions produced the reference build? provenance
2. Which prerequisites are required only for development, and which must exist on the execution machine? boundary
3. Can the available inputs produce an executable or component that passes the defined activation and workflow checks? measurement

Bounded change readiness

Capture the proposed intervention, its affected semantics and contracts, and the checks needed to accept or reverse it.

1. Which forms, error paths, data representations and COM contracts would this intervention affect? boundary
2. What observed workflows and consumer checks define acceptance for repair, wrapping or migration? action
3. Which reference binaries, installers and data fixtures must be retained to compare results and restore the prior deployment? action

Kinds and varieties

Reported by the breadth pass; each item needs checking against its source before it becomes normative.

1. Which of these kinds and varieties hold for the sense of Classic Visual Basic this model covers, and on what evidence? provenance