entry-point-designer

Protheus Entry Point Designer

Overview

Design, implement, and document Protheus Entry Points (Pontos de Entrada). Entry Points are the standard extensibility mechanism in TOTVS Protheus, allowing customization of standard ERP routines without modifying the original source code.

Language Priority — TLPP First

TLPP is the default and mandatory output language for every new Entry Point. Only generate AdvPL (.prw) when the user explicitly requests it (e.g., "em AdvPL", "como .prw", "legacy AdvPL", "sem TLPP").

• Default: generate .tlpp with #include "tlpp-core.th", type annotations, Try-Catch, and namespaced helpers when applicable
• Opt-in AdvPL: only when the user is explicit. If the request is ambiguous (e.g., the project still has many .prw files), confirm before falling back to AdvPL
• Migrating an existing .prw Entry Point: prefer rewriting in TLPP unless the user requires keeping the original extension

When to Use

• Creating a new Entry Point to customize standard Protheus behavior
• Documenting existing Entry Points
• Designing the PARAMIXB interface for custom Entry Points
• Migrating legacy Entry Points to TLPP

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How Entry Points Work

1. A standard TOTVS routine (e.g., MATA010, FINA010) calls ExistBlock("PE_NAME") at predefined extension points
2. If a User Function with the matching name exists in the RPO, it is executed
3. The standard routine passes parameters via the PARAMIXB array (Private variable)
4. The Entry Point returns a value that influences the standard routine's behavior

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MANDATORY Rules

Function Naming — NEVER use the U_ prefix

The compiler resolves U_ automatically at runtime. Adding it manually causes the Entry Point to never be triggered.

✅ Correct	❌ Wrong
User Function MT410INC()	User Function U_MT410INC()
User Function A010TOK()	User Function U_A010TOK()

File Naming — match the Entry Point name exactly

File name must be the Entry Point name in uppercase + language extension. No namespaces, no prefixes, no suffixes.