property OnConnect: TIdServerThreadEvent;

OnConnect is a TIdMappedPortContextEvent property that represents the event handler signalled when the local client for the proxied connection has been connected. 

Event handlers are signalled in the following order during server processing for new client connections: 

• OnBeforeConnect
• OnConnect
• OnOutboundConnect
• OnExecute
• OnOutboundData

Assign a procedure to the OnConnect event handler to allow responding to the new connection during execution of a TIdMappedPortContext instance in the server. 

Use OnOutboundConnect to perform processing required when the connection to the remote system in MappedHost and MappedPort has been configured and opened for the proxied connection.