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To invoke an external component from a USoft application, you need to perform the following general steps:

1. Build the external component using DCOM, or find a predefined component.
2. Define the component, its method, and its parameter list in the USoft repository. Depending on how the component is to be used, you may need to associate it with the USoft query protocol.
3. Invoke the component method from one or more SQL statements within the application, using the INVOKE clause.

Related Topics

Defining External Components in the Repository

Writing an External Component

Preparing Components for Use in a USoft Application

Invoking Components from a USoft Application

Possible USoft Contexts for INVOKE

When and How Many Times a Component Is Invoked

Component Construction

Internal Components

The Internal RulesEngine Component

The ExecuteStatement Method

The MustExistExecuteStatement Method

The StartCatchingErrors Method

The StopCatchingErrors Method

The GetLastCaughtErrors Method

The GetLastCaughtErrorsAsXML Method

The GetProperty Method

The GetRegistry Method

The PreCommit Method

The SetProperty Method

The SetTransactionMode Method

The SetUser Method