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Programmatically change proxy settings

Posted on 2006-06-22
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Last Modified: 2012-06-27
Hi experts,

How can I programmatically switch the Lan settings between Automatically detect settings, and use proxy settings (Proxy 8080)?
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Question by:jonastovsen
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6 Comments
 
LVL 96

Expert Comment

by:Bob Learned
ID: 16964194
The best question I can ask right now is, "Why?"

Bob
0
 

Author Comment

by:jonastovsen
ID: 16964292
Because some of the users are connected through a VPN connection, and som are not. I want to give the user the opportunity to easily swith between Proxy and not.
0
 
LVL 96

Expert Comment

by:Bob Learned
ID: 16964327
Now I understand ;)

Here is a C# example:

SwitchNetConfig - Laptop users, quickly switch network and proxy configuration in different places
http://www.codeproject.com/csharp/oazswitchnetconfig.asp

Bob
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Author Comment

by:jonastovsen
ID: 16964515
Thank you! The program on the link looks fine, but unfortunately I don't write C#. It would take me significant time to translate it.
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LVL 96

Accepted Solution

by:
Bob Learned earned 2000 total points
ID: 16964598
Good thing I can:

Imports Microsoft.Win32

''' <summary>
''' Summary description for IEProxy.
''' </summary>
Public Class IeProxy

#Region "Variables"
  Private Shared ReadOnly currentUser As RegistryKey = Registry.CurrentUser
  Private Shared _InternetSettings As RegistryKey
#End Region

#Region "Public static methods"
  ''' <summary>
  ''' Open the key where Internet Explorer store's its proxy setting
  ''' </summary>
  Private Shared Sub OpenInternetSettings()
    _InternetSettings = currentUser.OpenSubKey("Software\Microsoft\Windows\CurrentVersion\Internet Settings", True)
  End Sub


  ''' <summary>
  ''' Proxy Server name. It can be IP, IP:PORT or a HTTP URL with PORT
  ''' </summary>
  Public Shared Property ProxyServer() As String
    Get
      OpenInternetSettings()
      Dim value As String = DirectCast(_InternetSettings.GetValue("ProxyServer", String.Empty), String)
      _InternetSettings.Close()
      Return value
    End Get
    Set(ByVal Value As String)
      OpenInternetSettings()
      _InternetSettings.SetValue("ProxyServer", Value)
      _InternetSettings.Close()
    End Set
  End Property


  ''' <summary>
  ''' True means proxy setting is applied, otherwise proxy is ignored
  ''' </summary>
  Public Shared Property ProxyEnabled() As Boolean
    Get
      OpenInternetSettings()
      Dim value As Integer = DirectCast(_InternetSettings.GetValue("ProxyEnable", 0), Integer)
      _InternetSettings.Close()
      Return (value > 0)
    End Get
    Set(ByVal Value As Boolean)
      OpenInternetSettings()
      Dim setValue As Integer = (IIf(Value, 1, 0))
      _InternetSettings.SetValue("ProxyEnable", setValue)
      _InternetSettings.Close()
    End Set
  End Property

  Public Shared Property BypassProxyForLocal() As Boolean
    Get
      OpenInternetSettings()
      Dim value As String = DirectCast(_InternetSettings.GetValue("ProxyOverride", String.Empty), String)
      _InternetSettings.Close()
      ' If bypass proxy set, then it should contain <local>
      If value.IndexOf("<local>") >= 0 Then
        Return True
      Else
        Return False
      End If
    End Get
    Set(ByVal Value As Boolean)
      OpenInternetSettings()
      Dim existingValue As String = DirectCast(_InternetSettings.GetValue("ProxyOverride", String.Empty), String)
      If existingValue.IndexOf("<local>") >= 0 Then
        If Not Value Then
          existingValue = existingValue.Replace(";" + Environment.NewLine + "<local>", "")
        End If
      Else
        ' does not contain the local keyword. Add it.
        If Value Then
          existingValue += ";" + Environment.NewLine + "<local>"
        End If
      End If
      _InternetSettings.SetValue("ProxyOverride", existingValue)
      _InternetSettings.Close()
    End Set
  End Property
#End Region

End Class

Bob
0
 

Author Comment

by:jonastovsen
ID: 16968125
Fantastic!

Thank you for taking the time to translate the code!
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