Inside Macintosh: More Macintosh Toolbox /

Chapter 6 - Component Manager / Component Manager Reference

Routines for Applications / Getting Information About Components

ComponentFunctionImplemented

The ComponentFunctionImplemented function allows you to determine whether a component supports a specified request. Your application can use this function to determine a component's capabilities.

FUNCTION ComponentFunctionImplemented (ci: ComponentInstance; 
                                       ftnNumber: Integer)
                                       : LongInt; 

ci

A component instance that specifies the connection for this operation. Your application obtains the component instance from the OpenDefaultComponent or OpenComponent function.

ftnNumber

A request code value. For other components, see the documentation supplied with the component for request code values.

DESCRIPTION

The ComponentFunctionImplemented function returns a long integer indicating whether the component supports the specified request. You can interpret this long integer as if it were a Boolean value. If the returned value is TRUE, the component supports the specified request. If the returned value is FALSE, the component does
not support the request.