Option Explicit
Const PortsChecked = 200
Private Sub Command1_Click()
Timer1.Enabled = True
Timer1.Interval = 1000
End Sub
Private Sub Command2_Click()
Timer1.Interval = 0
Timer1.Enabled = False
End Sub
Private Sub Timer1_Timer()
Dim X As Integer
List1.Clear
For X = 1 To PortsChecked
DoEvents
Text1.Text = X
WinSock1.LocalPort = X
On Error Resume Next
WinSock1.Listen ' If we get an error, the port is busy.
If Err.Number = 10048 Then
List1.AddItem X ' Log Active port # to list box.
Err.Number = 0
End If
WinSock1.Close
Next X
End Sub
Private Sub Form_Load()
Label1.Caption = "Checking Port #"
Label2.Caption = "Ports In Use"
Command1.Caption = "Start"
Command2.Caption = "End"
Text1.Locked = True
End Sub
