IdTCPClient

TIdTCPClientCustom is a TIdTCPConnection descendant that specifies the interface used for a TCP (Transmission Control Program) client. 

TIdTCPClientCustom implements properties, methods, and events that provide the following capabilities for the client: 

• Get/Set the host and port numbers for the connection.
• Get/Set the Username and Password for the connection.
• Create or assign an IOHandler for the connection.
• An OnConnected event handler.
• Connect methods to establish the connection to the peer.
• ConnectAndGetAll to connect, read all available data, and disconnect.

TIdTCPClientCustom is the ancestor class for TIdTCPClient, which publishes properties and event handlers for the client. TIdTCPClientCustom is also used as the ancestor for many clients that implement specific RFC-compliant protocols.

TIdTCPConnection 

TIdTCPClient