RPG 4

Note that RPG 4 can do just about anything that could be done by earlier versions of RPG such as RPG/400 and an enormous volume of additional capabilities.

References

RPG IV with free format op codes
Built In Functions
Program To System Fields
Function Key AID Bytes

Data Structure Information

Program Status Data Structure
Workstation Data Structure

Code Samples

Locate field value field name
SQLSTATE Constants

FAQ

What does BINARY(4) mean in API documentation?