Private Sub Command1_Click()
Dim x As Integer
Dim items As ListItem
Dim PortsChecked As Integer
PortsChecked = Int(Text1.Text)
逐个端口检测
For x = 1 To PortsChecked
Label2.Caption = "扫描中。。。"
DoEvents
Winsock1.LocalPort = x
On Error Resume Next
Winsock1.Listen
如果得到错误代码,说明此端口被使用
If Err.Number = 10048 Then
Set items = ListView1.ListItems.Add(, , Winsock1.LocalIP)
items.SubItems(1) = x
Err.Number = 0
End If
Winsock1.Close
Label2.Caption = "扫描完毕。。。"
Next x

End Sub