Private Sub Form_Load()
CountID = 0
ExitID = False
ListView1.ColumnHeaders.Add 1, , "源 IP", 1500
ListView1.ColumnHeaders.Add 2, , "源端口", 1500
ListView1.ColumnHeaders.Add 3, , "目标 IP", 1500
ListView1.ColumnHeaders.Add 4, , "目标端口", 1500
ListView1.ColumnHeaders.Add 5, , "协议", 1500
ListView1.ColumnHeaders.Add 6, , "时间", 1500
End Sub

Private Sub Form_Unload(Cancel As Integer)
Call WCleanup(s)
Unload Me
End Sub

Private Sub ListView1_Click()
Dim coun As Long
Dim sar As String, sar3 As String
Dim sar1 As String, sar2 As String

RichTextBox1.Text = "" '清除 RichTextBox1
Dim buffer() As Byte
buffer = str

If ListView1.SelectedItem Is Nothing Then '如果 ListView1 控件没有数值则提示错误
Exit Sub
End If


'将 buffer 的值（即通过 Recibir 接收的数据包）转换为一定格式并在 RichTextBox1 控件下显示出来
For i = 0 To resarray(ListView1.SelectedItem.Index)
coun = coun + 1
If Len(Hex(buffer(i))) = 1 Then
sar = "0" & Hex(buffer(i))
Else
sar = Hex(buffer(i))
End If

sar3 = sar3 & sar

If Asc(Chr("&h" & Hex(buffer(i)))) < 32 Then
sar1 = "."
Else
sar1 = Chr("&h" & Hex(buffer(i)))
End If

sar2 = sar2 & sar1
RichTextBox1.Text = RichTextBox1.Text & sar & " "

If coun = 15 Then
RichTextBox1.Text = RichTextBox1.Text & " |" & sar2 & vbCrLf:
coun = 0
sar2 = ""
sar3 = ""
End If
Next i

If coun < 15 Then
r = 44 - (coun * 3) + 1
es = String(r, Chr(32))
RichTextBox1.Text = RichTextBox1.Text & es & " |" & sar2
End If
End Sub

Private Sub M_Clear_Click()
ListView1.ListItems.Clear
RichTextBox1.Text = ""
End Sub

'程序开始捕捉
Private Sub M_Start_Click()
ListView1.ListItems.Clear
RichTextBox1.Text = ""
Connecting ip(hostname), MsgHwnd '开始截取封包
End Sub


Private Sub M_Stop_Click()
ExitID = True '停止截取封包
End Sub

Private Sub MsgHwnd_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
CountID = CountID + 1
Recibir s, 1
If ExitID = True Then
Call WCleanup(s)
ExitID = False
MsgBox "退出", vbOKOnly, "数据封包截取"
End If
End Sub

模块：

Option Explicit

'WSAstartup 用来判断 Windows 所支持的 Winsock 版本，也就是初始化 Winsock DLL，其中第一个参数为你所想需要的Winsock版本！低字节为主版本，高字节为副版本！由于目前Winsock有两个版本：1.1和2.2，因此该参数可以是0x101或0x202；第二个参数是一个WSADATA结构，用于接收函数的返回信息！WSAStartup函数调用成功会返回0，否则返回非0值！
'WSACleanup 用来关闭 Winsock，与 WSAstartup 一起使用，即 WSAstartup 也可以看为启动 Winsock
'gethostbyname 用来返回一个关于主机信息的结构的指针
Public Declare Function WSAstartup Lib "wsock32.dll" Alias "WSAStartup" (ByVal wVersionRequired As Integer, ByRef lpWSAData As WSAdata) As Long
Public Declare Function WsACleanup Lib "wsock32.dll" Alias "WSACleanup" () As Long
Public Declare Sub CopyMemory Lib "kernel32.dll" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal length As Long)
Public Declare Function lstrlen Lib "kernel32.dll" Alias "lstrlenA" (ByVal lpString As Any) As Long
Public Declare Function lstrcpy Lib "kernel32.dll" Alias "lstrcpyA" (ByVal lpString1 As Any, ByVal lpString2 As Any) As Long
Public Declare Function inet_ntoa Lib "wsock32.dll" (ByVal addr As Long) As Long
Public Declare Function gethostname Lib "wsock32.dll" (ByVal name As String, ByVal namelen As Long) As Long
Public Declare Function gethostbyna