TPing

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Overview

unit		Ping.pas
inheritance

The TPing component implements at least parts of the ICMP protocoll.

It can be used to check whether some other host is reachable or not.

Properties

Address		The host's IP or DNS address which will be pinged.
DNSResult		?.
ErrorCode		?.
ErrorString		ErrorMessage.
Flags		Integer?
HostName		?.
HostIP		?.
ICMPDLLHandle		TPing uses the ICMP internally via this handle.
Name		Name of the instance.
Reply		?.
Size		Size of the ICMP packet sent in bytes.
Tag		Integer value which can be used for your own purposes, e.g. when iterating through all controls of a form.
Timeout		Time in miliseconds which may elapse between sending and receiving the ICMP packet.
TTL		Sets the Time To Live value within the packet being sent.

Methods

CancelDNSLookup		Cancel a running DNS lookup.
Create		Create the instance.
DNSLoopup		Look up the IP to a given DNS address.
Ping		Sends the ICMP packet.

Events

OnDisplay		?.
OnDNSLookupDone		Called when the DNS Lookuop ?.
OnEchoRequest		Called when the request is being sent.
OnEchoReply		Called when the answer to the ping arrive.

How to

• Ping a single host
• Ping a host in the background

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ICS Components Reference