The present invention provides an extensible automation development environment. A full development environment in its own right, the environment, in addition to supporting its own native objects, allows the integration of foreign (or "custom") automation objects. Custom commands and custom events are also integrated into the environment and are handled by the same framework that handles native commands and events. Tools provided by the environment are made to work with custom objects as well as with native objects. For example, a common editor expands to incorporate a custom editor that handles custom data fields. A common browser expands to seamlessly incorporate a custom browser that may operate on custom automation objects from a custom database. All software entities, native and custom, can be developed and monitored within a single framework. Users operate seamlessly across heterogeneous automation environments, even though custom entities in the environment conform to their own operating standards.