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06-02-2007 10:39 AM
The "Ethernet Packet Sniffer Utility Using WinPcap Functions " should get you part of what you are asking.
LabVIEW offers API's for level 3 and for as outlined in the Wiki reference Mike provided.
If you search the LabVIEW help for TCP/IP you will find examples for level three.
The Send E-mail example demonstrates utilizing level 4 through SMTP.
Ben