Big Endian format and IP Address

[ddspliting]

declaring a new IP address Dim add As IPAddress(New Address As Long) the long value of IP Address? how to find that? it says like a value 0x3l3443 in big endian format... how to convert IP to big endian or Long?

[Christian Graus]

Just use shift operators to move your 4 bytes into the right locations of your single digit.

Christian Graus No longer a Microsoft MVP, but still happy to answer your questions.

[ddspliting]

didn't get that honestly! say i ve an IP 123.212.4.3 hot to find its long or big endian form?

[Christian Graus]

In C#, you'd do do 123 << 8 to move the byte across by 8 bits. I don't know how to do that in VB, but that's the general idea. You could just multiple by 2 to the power of 8, 2 to the power of 16 and 2 to the power of 24, if you can't find the shift operator. Oops - this is the C# forum. 123 << 24 + 212 << 16 + 4 << 8 + 3 would move them so they were in order, left to right. I'm sure that's not big endian, so get the order of digits right and that should work. http://www.codeproject.com/KB/cs/leftrightshift.aspx[^] explains how it all works. There's at least one other article that has a helper class you may want to check out.

Christian Graus No longer a Microsoft MVP, but still happy to answer your questions.

[Alan N]

Are the IPAddress.NetworkToHostOrder and IPAddress.HostToNetworkOrder methods of any use to you? Alan.