TIdComponent = class(TIdBaseComponent);

TIdComponent is a TIdBaseComponent descendant and the ancestor class for Indy components using Status or Work mode events. 

TIdComponent implements event handlers used to signal state change, input, and output operations using the component. 

TIdComponent implements an overridden protected InitComponent method used to initialize the component, including the global stack instance count and the GStack variable used in the Indy library. InitComponent protects access to the stack instance count using TIdCriticalSection.