Enable or disable internet connection of remote computers

[tauhu82]

Halo i'm looking for ways to enable or disable internet connection of remote computers, like everythings are controlled by the server computer. Can anyone give me some advise on this matter... A sampel would be nice.. Thanks alot..

[the182guy]

When you want to disconnect the internet of the client you can do it by having your server send some data which tells it to d/c, when the clients receives this, it calls the disconnect internet API which can be found on this forum if you search.

client data arrival sub:

Dim strBuffer as String

Winsock1.GetData strBuffer

If strBuffer = "[DISCONNECT]" & vbcrlf Then
     'Call disconnect internet API here
End if 

In the server command button which DC's the client

Winsock1(2).SendData "[DISCONNECT]" & vbCrLf
'This will tell client 2 to d/c 
 

[tauhu82]

Thank you so much. I will try it and tell you all what are the results. Have a nice day....

[qhyzme]

Originally Posted by the182guy

When you want to disconnect the internet of the client

client data arrival sub:

Dim strBuffer as String

Winsock1.GetData strBuffer

If strBuffer = "[DISCONNECT]" & vbcrlf Then
     'Call disconnect internet API here
End if 

In the server command button which DC's the client

Winsock1(2).SendData "[DISCONNECT]" & vbCrLf
'This will tell client 2 to d/c 
 

just wanna ask where i can see internet API.

thanks in advance.

[tauhu82]

I have tried to find the disconnect internet API but i can't seem to find it anywhere. Can someone please show us where to find it.

Thanks alot..

[the182guy]

This thread has the API's

http://www.vbforums.com/showthread.php?t=388647

[tauhu82]

Hai the182guy,

Thanks for your API site. But i still have one small question. Can the coding work if the computer is connected to the internet though LAN. We are using broadband with router and switch to connect to each of the computers to the internet.

Thanks alot in advanced

[the182guy]

if your using a router, you can d/c the network conection using the WNNetCancel API, here it is:

http://www.mentalis.org/apilist/WNet...nnection.shtml

[tauhu82]

Client

        Case "Connect"
             AddConnection
        Case "Disconnect"
             CancelConnection

Module
Public Declare Function WNetAddConnection Lib "mpr.dll" Alias "WNetAddConnectionA" (ByVal lpszNetPath As String, ByVal lpszPassword As String, ByVal lpszLocalName As String) As Long
Public Declare Function WNetCancelConnection Lib "mpr.dll" Alias "WNetCancelConnectionA" (ByVal lpszName As String, ByVal bForce As Long) As Long
Public Const WN_SUCCESS = 0 ' The function was successful.
Public Const WN_NET_ERROR = 2 ' An error occurred on the network.
Public Const WN_BAD_PASSWORD = 6 ' The password was invalid.

Public Sub AddConnection()

 Dim AddConnection As Integer
 Dim MyShareName As String
 Dim MyPWD As String
 Dim UseLetter As String
 
    On Local Error GoTo AddConnection_Err
    AddConnection = WNetAddConnection(MyShareName, MyPWD, UseLetter)
AddConnection_End:
    Exit Sub
AddConnection_Err:
    AddConnection = Err
    MsgBox Error$
    Resume AddConnection_End
End Sub

Public Sub CancelConnection()
 Dim CancelConnection As Integer
 Dim DriveLetter As String
 Dim Force As Integer
 
    On Local Error GoTo CancelConnection_Err
    CancelConnection = WNetCancelConnection(DriveLetter, Force)
CancelConnection_End:
    Exit Sub
CancelConnection_Err:
    CancelConnection = Err
    MsgBox Error$
    Resume CancelConnection_End
End Sub 

Server

Private Sub Command1_Click()
sckControlPanel.SendData "Connect#"
End Sub

Private Sub Command2_Click()
sckControlPanel.SendData "Disconnect#"
End Sub 

PS:sckControlPanel = Winsock

Guys the above are the two of the coding which i obtain from http://www.mentalis.org/apilist/WNet...nnection.shtml

The first part is for the client side and the second one is for the server side. Now i wonder what did i do wrong because when i execute the disconnect command from the server side to the client, nothing is happening. Can somebody tell me what is wrong please....

Thanks alot in advanced

[the182guy]

do you have any code so that the client can receive the data?

[tauhu82]

Client

Private Sub sckControlPanel_DataArrival(ByVal bytesTotal As Long)
Dim Command As String, txtData As String
Dim Position As Integer
    
On Error Resume Next
    sckControlPanel.GetData txtData
    
    Position = InStr(1, txtData, "#")
    Command = Left(txtData, Position - 1)
    txtData = Mid(txtData, Position + 1)
    
    Select Case Command
            
        Case "ScreenSaver"
            RunScreenSaver
        Case "CDDoor"
            If txtData = "Open" Then
                OpenCDDoor
            Else
                CloseCDDoor
            End If
        Case "LockSystem"
            SystemParametersInfo SPI_SCREENSAVERRUNNING, _
            1&, Null, SPIF_UPDATEINIFILE
            LockForm.Show
        Case "UnLockSystem"
             Unload LockForm
             UnlockForm.Show
        Case "Logoff"
            ExitWindowsEx (EWX_LOGOFF Or EWX_FORCE), &HFFFF
        Case "Reboot"
            AdjustToken
            ExitWindowsEx (EWX_SHUTDOWN Or EWX_FORCE Or EWX_REBOOT), &HFFFF
        Case "Shutdown"
            AdjustToken
            ExitWindowsEx (EWX_SHUTDOWN Or EWX_FORCE), &HFFFF
        Case "GetUserName"
            txtData = GetUser()
            sckControlPanel.SendData "GetUserName#" & txtData
        Case "GetTickCount"
            txtData = GetLoginTime
            sckControlPanel.SendData "GetTickCount#" & txtData
        Case "SystemInfo"
            txtData = "SystemInfo#" & SystemInfo()
            sckControlPanel.SendData txtData
        Case "Connect"
             AddConnection
        Case "Disconnect"
             CancelConnection
        Case "Message"
            MsgBox txtData, vbExclamation, "Windows Message"
        Case "Date&Time"
        Case "Mouse"
    End Select
End Sub 

I put this part at the client side. so when i execude this

Server

Private Sub Command1_Click()
sckControlPanel.SendData "Connect#"
End Sub

Private Sub Command2_Click()
sckControlPanel.SendData "Disconnect#"
End Sub 

It should have call for the disconnect to function. But nothing seem to be happening. I wonder why??

[the182guy]

in the Case "Disconnect" part put a msgbox and try it, this will tell you if its a problem with the connection/data arrival or a problem with the CancelConnectionAPI

also make s small app that just uses the CancelConnection API and try it, to see if the API actually works

[tauhu82]

I have tried with the msgbox and the connection part is ok so i have also tried with this

Private Declare Function WNetAddConnection Lib "mpr.dll" Alias "WNetAddConnectionA" (ByVal lpszNetPath As String, ByVal lpszPassword As String, ByVal lpszLocalName As String) As Long
Private Declare Function WNetCancelConnection Lib "mpr.dll" Alias "WNetCancelConnectionA" (ByVal lpszName As String, ByVal bForce As Long) As Long
Const WN_SUCCESS = 0 ' The function was successful.
Const WN_NET_ERROR = 2 ' An error occurred on the network.
Const WN_BAD_PASSWORD = 6 ' The password was invalid.

Private Sub Form_Load()
 Dim CancelConnection As Integer
 Dim DriveLetter As String
 Dim Force As Integer
 
    On Local Error GoTo CancelConnection_Err
    CancelConnection = WNetCancelConnection(DriveLetter, Force)
    
CancelConnection_End:
    Exit Sub
CancelConnection_Err:
    CancelConnection = Err
    MsgBox Error$
    Resume CancelConnection_End
    
   
End Sub 

On a single form and when i excecute it also nothing is happening. Can someone tell me why???