PeopleCode is a programming language used in the PeopleSoft ERP system. This language is used to create, modify, and manage the application's business logic, data handling, and user interface. PeopleCode is a popular programming language, with many developers using it to build complex business applications. This document will provide a beginner's guide to PeopleCode, including its history, syntax, and applications.

History of PeopleCode

PeopleCode was first introduced in 1993 with the release of PeopleTools version 4. The language was designed to provide a simple yet powerful way to customize PeopleSoft applications. It is similar to other popular programming languages like Java and C++, but it is specifically tailored to work with the PeopleSoft ERP system.

Syntax of PeopleCode

PeopleCode syntax is based on the C programming language. It is a case-insensitive language, which means that upper- and lowercase letters are treated the same. Here is an example of a simple PeopleCode program:

```
Local string &name = "John";
MessageBox(0, "", "", "Hello " | &name);
```

This code creates a local variable called `&name` and sets its value to "John". It then displays a message box with the text "Hello John". This is a simple example, but it demonstrates the basic syntax of PeopleCode.

Applications of PeopleCode

PeopleCode is used in a wide range of applications, from simple data handling to complex business logic. Some of the most common applications of PeopleCode include:

1. Customizing PeopleSoft applications: PeopleCode allows developers to modify and customize PeopleSoft applications to meet their specific business needs.

2. Building complex business logic: PeopleCode is used to create complex business logic, such as rules for financial transactions or automated workflows.

3. Creating custom reports: PeopleCode is used to create custom reports and data queries that can be used to extract data from the PeopleSoft system.

4. Enhancing the user interface: PeopleCode is used to enhance the user interface of PeopleSoft applications by adding custom menus, buttons, and fields.

Example of PeopleCode

Here is an example of PeopleCode that demonstrates how to add a custom field to a PeopleSoft page:

```
Local Record &rec = GetRecord(Record.PS_EMPLOYEES);
&rec.AddField(Field.PS_CUSTOM_FIELD);
```

This code creates a new local variable called `&rec` and sets its value to the `PS_EMPLOYEES` record. It then adds a new field called `PS_CUSTOM_FIELD` to the record. This is a simple example, but it demonstrates how PeopleCode can be used to modify the structure of a PeopleSoft page.

Conclusion

PeopleCode is a powerful programming language that is used to create, modify, and manage PeopleSoft applications. It has a simple syntax that is based on the C programming language, making it easy to learn for developers with programming experience. PeopleCode is used in a wide range of applications, from simple data handling to complex business logic. With its flexibility and power, PeopleCode is a valuable tool for any developer working with the PeopleSoft ERP system.