Release 10.1A: OpenEdge Development:
Programming Interfaces

ActiveX control restrictions

A single control-frame is capable of holding only a single ActiveX control. However, you can include many control-frames (and thus many ActiveX controls) in a Progress frame. This limitation incurs certain restrictions on the types of ActiveX controls that you can use. For instance, there is no internal support for container controls—that is, controls that allow multiple controls to reside inside of them.