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Using COM Objects In the 4GL

Both ActiveX Automation objects and ActiveX controls are COM objects—objects that conform to the specifications of the Microsoft Component Object Model (COM). As such, COM objects have common features that govern the programming of both Automation objects and ActiveX controls in the 4GL.

This chapter describes the common features of COM objects supported by Progress and how to work with them in a 4GL application and your development environment, in the following sections:

For an overview of the architectural elements that support COM objects in Progress, see Introduction." For information on COM object support that is unique for Automation objects, see "ActiveX Automation Support" and for ActiveX controls, see ActiveX Control Support." The information in this chapter applies equally to Automation objects and ActiveX controls, except where noted.


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