Events for the OLE control – PB Docs 2019

There are several events that let PowerBuilder know when actions
take place in the server application that affect the OLE
object.

Events for data

Events that have to do with data are:

When these events occur, the changes are reflected automatically
in the control. If you need to perform additional processing when the
object is renamed, saved, or changed, you can write the appropriate
scripts.

Because of the architecture of OLE, you often cannot interact
with the OLE object within these events. Trying to do so can generate
a runtime error. A common workaround is to use the PostEvent function
to post the event to an asynchronous event handler. You do not need to
post the SaveObject event, which is useful if you want to save the
data in the object to a file whenever the server application saves the
object.

Events for properties

If the server supports property notifications, then when values
for properties of the server change, the PropertyRequestEdit and
PropertyChanged events will occur. You can write scripts that cancel
changes, save old values, or read new values.

For more information about property notification, see Creating hot
links.