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Programming Interfaces
External Program Interfaces : ActiveX Control Support : How ABL supports ActiveX controls : Additional control functionality
Additional control functionality
An ABL control container often maintains information regarding the management of the controls it contains. This information is available as an extended control which essentially provides a wrapper around the base control. Even though the extended control maintains the extended properties, methods, and events, each of these appears as though it is part of the base control. As a result, accessing any extended feature is identical to accessing a feature on the base control itself. An example of an extended property is the property Tag, as its functionality is provided by the container. The base control does not even know the property Tag exists. It is the extended control that handles any access to the Tag property.
* Properties