Pinging Network Computers

How to effeciently find computers on the local LAN

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0 Replies - 1336 Views - Last Post: 18 May 2008 - 02:34 AM Rate Topic: -----

#1 qqwetiqewq  Icon User is offline

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Pinging Network Computers

Posted 18 May 2008 - 02:34 AM

I want to find active computers on the local LAN.
I've written the following code that searches all possible LAN IPs by pinging them.

Public Sub FindPCs()
		Dim NetworkIP As String
		Dim NetIPStub As String
		Dim PCs(255) As String
		Dim mCount As Int16 = 0

		'Get the LAN IP of this computer
		NetworkIP = getNetworkIP().ToString

		'Loop through all IPs assuming 255.255.255.0 subnet
		For i As Int16 = 0 To 255

			'Get the base of the ip, ie. 192.168.x
			NetIPStub = NetworkIP.Substring(0, NetworkIP.LastIndexOf("."))

			'add i to the end, ie. 192.168.x.i
			NetIPStub += "." + i.ToString

			'ping it
			'if successful add to list
			If My.Computer.Network.Ping(NetIPStub, 10) Then
				PCs(mCount) = NetIPStub
				mCount += 1
			End If

		Next

		'let me know when done
		MsgBox("Done")

	End Sub



However this takes ages to process.
Is there a better way?

Thank you.

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