OLE custom controls

The OLE control button in the Controls menu gives you the
option of inserting an object or a custom control in an OLE container.
When you select an OLE custom control (ActiveX control), you fix
the container’s type and contents. You cannot choose later
to insert an object and you cannot select a different custom control.

Each ActiveX control has its own properties, events, and functions.
Preventing the ActiveX control from being changed helps avoid errors
later in scripts that address the properties and methods of a particular
ActiveX control.

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