DWINSOCK V1.0
-------------

A Windows Socket interface component for use with Borland Delphi.

By Ulf Söderberg
ulfs@sysinno.se

This is a short description of the DWinSock component for Borland Delphi
that is contained in the file DWINSOCK.ZIP.

I am going to create a Delphi installable help file sometime soon.
For now, you have to rely on this description and on the contents of the
source files.

FILE CONTENTS
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Files that originally came from PASOCK10.ZIP that has been changed by me:
WINSOCK.INC	Part of the old WINSOCK.PAS (included in DWINSOCK.PAS)
WINSOCK.IF	Part of the old WINSOCK.PAS (included in DWINSOCK.PAS)
WINSOCK.IMP	Part of the old WINSOCK.PAS (included in DWINSOCK.PAS)
ERROR.INC	Part of the old WINSOCK.PAS (included in DWINSOCK.PAS)

Original work by myself:
DWINSOCK.RES	Contains two bitmaps for the controls, just blank bitmaps now.
DWINSOCK.DCR	Contains two component palette bitmaps (very Q&D).
DWINSOCK.PAS	The source code of the component.
DWINSOCK.DCU	The compiled unit.

THE COMPONENTS IN DWINSOCK
--------------------------
DWinSock contains two components which I have named TClientSocket and
TServerSocket. As the names implies, they are to be used in client or
server applications.

TClientSocket Properties
	Host		name of remote host, a string
	Address		address of remote host, a string like '127.0.0.1'
	Port		port number, an integer
	Service		name of port, a string
	Conn		current TSocket
	Description	name of underlying WinSock
	Text		send or receive a string
	BytesSent	get number of bytes sent after last assign to Text

TClientSocket Methods
	LocalHost	name of yourself
	Reverse		reverse lookup an address
	Open		do a connect
	Close		the opposite
	SendBuf		send a buffer
	RecvBuf		receive a buffer
	
TClientSocket Events
	OnInfo		progress indication
	OnConnect
	OnDisconnect
	OnRead		incoming data
	OnWrite		out buffer empty


TServerSocket Properties
	Port		port number, an integer
	Service		name of port, a string
	Conn		current TSocket
	Description	name of underlying WinSock
	Client		default array prop. to get TSocket of a connected client

TServerSocket Methods
	LocalHost	name of yourself
	Reverse		reverse lookup an address
	Listen		listen for incoming connections
	Close		the opposite
	SendBuf		send a buffer
	RecvBuf		receive a buffer

TServerSocket Events
	OnInfo		progress indication
	OnAccept	incoming connection accepted
	OnDisconnect	connection closed
	OnRead		incoming data
	OnWrite		outuf empty

OTHER OBJECTS
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Both TClientSocket and TServerSocket uses an object called TSocket which contains
the connection status like ip address and port number. TSocket has several
methods that you may call, they are:

	LookupName	convert a host name to an IP address.
	LookupService	convert a service name to a port number.
	LocalAddress	return your address for a connection.
	LocalPort	return your port number for a connection.
	RemoteHost	return the remote host name.
	RemoteAddress	return the remote IP address.
	RemotePort	return the remote port number.

EXCEPTIONS
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If anything goes wrong inside you will get an exception of type ESockError with
a message indicating what kind of error that cause the exception.

SUMMARY
-------
This was a very brief description of DWINSOCK. As you can see from the source
files it does not at all use all functions of Windows Sockets but it may
provide a quick solution to get into WinSock programming with Delphi.

I have included a sample application called NETTIME that is a time client.
It gets the current time of day from a time server.

You may use DWINSOCK any way you like but don't blame me.

Suggestions may be emailed to ulfs@sysinno.se