---
id: object/codeunit/20287
type: object
title: Codeunit 20287 "Use Case Event Library"
summary: Codeunit 20287 "Use Case Event Library" in INTaxEngine (Microsoft.Finance.TaxEngine.UseCaseBuilder). 2 public procedures, 5 events. Introduced in BC29, still in BC30.
tier: official
language: en
tags:
  - codeunit
  - intaxengine
versions:
  introduced: "29"
  last_changed: null
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
  input_hash: 288cb859c32ab0b33c8bc1337a749cd87f7c9ad8d3f7691ad35a14fddbfcf60c
evidence:
  - kind: code
    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/INTaxEngine/app/TaxEngine-UseCaseBuilder/src/Events/codeunit/UseCaseEventLibrary.Codeunit.al
    title: src/Apps/W1/INTaxEngine/app/TaxEngine-UseCaseBuilder/src/Events/codeunit/UseCaseEventLibrary.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
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object_type: codeunit
object_id: 20287
name: Use Case Event Library
namespace: Microsoft.Finance.TaxEngine.UseCaseBuilder
app: INTaxEngine
extends: null
first_version: "29"
last_version: "30"
present_in:
  - "29"
  - "30"
changed_in: []
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 7
  events: 5
  subscribers: 0
relations:
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  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 1
  calls: 0
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---

# Codeunit 20287 "Use Case Event Library"

> Codeunit 20287 "Use Case Event Library" in INTaxEngine (Microsoft.Finance.TaxEngine.UseCaseBuilder). 2 public procedures, 5 events. Introduced in BC29, still in BC30.

INTaxEngine · Microsoft.Finance.TaxEngine.UseCaseBuilder · BC29-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Apps/W1/INTaxEngine/app/TaxEngine-UseCaseBuilder/src/Events/codeunit/UseCaseEventLibrary.Codeunit.al) · facts from BC29

## Events published

- `OnAddUseCaseEventstoLibrary()` (integration)
- `OnAfterAddUseCaseEventToLibrary(FunctionName: Text[100]; TableID: Integer; Description: Text[250])` (integration)
- `OnAfterHandleBusinessUseCaseEvent(EventName: Text[150]; Record: Variant; CurrencyCode: Code[20]; CurrencyFactor: Decimal)` (integration)
  - subscribers: [Codeunit 20286 "Use Case Event Handling"](../codeunit/20286.md) OnAfterHandleBusinessUseCaseEvent
- `OnAfterRunBusinessUseCaseEngine(UseCaseID: Guid; var Record: Variant)` (integration)
- `OnAfterRunTaxUseCaseEngine(UseCaseID: Guid; var Record: Variant)` (integration)

## Procedures

- `AddUseCaseEventToLibrary(FunctionName: Text[100]; TableID: Integer; Description: Text[250])`
- `HandleBusinessUseCaseEvent(EventName: Text[150]; Record: Variant; CurrencyCode: Code[20]; CurrencyFactor: Decimal)`

## Across versions

- Present in: BC29-30
- Changed (declaration) in: none

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "codeunit", object_name: "Use Case Event Library")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.