Programmable OLE Objects – PB Docs 2019

You do not need to place an OLE control on a window to manipulate an
OLE object in a script. If the object does not need to be visible in your
PowerBuilder application, you can create an OLE object independent of a
control, connect to the server application, and call functions and set
properties for that object. The server application executes the functions
and changes the object’s properties, which changes the OLE object.

For some applications, you can specify whether the application is
visible. If it is visible, the user can activate the application and
manipulate the object using the commands and tools of the server
application.