Calling external functions – PB Docs 2021

Global external functions

In PowerBuilder, you call global external functions using the same
syntax as for calling user-defined global and system functions. As with
other global functions, global external functions can be triggered or
posted but not called dynamically.

Local external functions

Call local functions using the same syntax as for calling object
functions. They can be triggered or posted and called
dynamically.

For information

For information, see Syntax for calling PowerBuilder
functions and events.