為了方便廣大VB愛好者也能向C語言一樣能截獲IP包，本人特地寫了以下的源代碼，以供VB開發者參考。
以下是在VB中截獲WIN2000下TCP/IP包的源代碼，在VB6.0,win2000下測試通過，需要注意的地方是，1.必須和本地的一塊網卡,2.每次獲取數據後必須有一段延時。3.數據取到之後放在Buff的數組中。4.把以下的代碼放在一個模塊中就可以了。
'-----------------------------代碼開始--------------------------------------------------
Declare Function bind Lib "ws2_32.dll" (ByVal s As Long, addr As SOCK_ADDR, ByVal namelen As Long) As Long
Declare Function closesocket Lib "ws2_32.dll" (ByVal s As Long) As Long
Declare Function connect Lib "ws2_32.dll" (ByVal s As Long, name As SOCK_ADDR, ByVal namelen As Integer) As Long
Declare Function inet_addr Lib "ws2_32.dll" (ByVal cp As String) As Long
Declare Function htons Lib "ws2_32.dll" (ByVal hostshort As Integer) As Integer
Declare Function recv Lib "ws2_32.dll" (ByVal s As Long, buffer As Any, ByVal length As Long, ByVal flags As Long) As Long
Declare Function send Lib "ws2_32.dll" (ByVal s As Long, buffer As Any, ByVal length As Long, ByVal flags As Long) As Long
Declare Function shutdown Lib "ws2_32.dll" (ByVal s As Long, ByVal how As Long) As Long
Declare Function ioctlsocket Lib "ws2_32.dll" (ByVal s As Long, ByVal v As Long, ut As Long) As Long
Declare Function socket Lib "ws2_32.dll" (ByVal af As Long, ByVal type_specification As Long, ByVal protocol As Long) As Long
Declare Function WSACancelBlockingCall Lib "ws2_32.dll" () As Long
Declare Function WSACleanup Lib "ws2_32.dll" () As Long
Declare Function WSAGetLastError Lib "ws2_32.dll" () As Long
Declare Function WSAStartup Lib "ws2_32.dll" (ByVal wVersionRequired As Integer, wsData As WSA_DATA) As Long
Declare Function WSASocketA Lib "ws2_32.dll" (ByVal af As Long, ByVal type1 As Long, ByVal protocol As Long, lpProtocolInfo As Long, g As Long, ByVal dwFlags As Long)
Declare Function WSAIoctl Lib "ws2_32.dll" (ByVal s As Long, ByVal dwIoControlCode As Long, lpvInBuffer As Long, ByVal cbInBuffer As Long, lpvOutBuffer As Long, ByVal cbOutBuffer As Long, lpcbBytesReturned As
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