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RAD Studio VCL Reference
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TCustomWinSocket.LookupService Method
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RAD Studio VCL Reference
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Returns the port number associated with a specific service.
function LookupService(const service: string): Integer;
__fastcall int LookupService(const AnsiString service);
Call LookupService to obtain the standard port number for the service named by the service parameter. Windows provides a number of standard service names such as ftp, http, finger, or time. Each standard service is associated, by convention, with a specific port number. These standard port numbers allow client sockets to indicate the desired service by requesting a specific port number. They allow server sockets to listen on an expected port number for the service offered. Servers can specify additional services and their associated ports in a SERVICES file. For more information on the SERVICES file, see the Microsoft documentation for Windows sockets.
InitSocket calls LookupService to obtain the port number for the Service specified by a socket component.
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Description