Try this:

 [DllImport ("wininet.dll")]
 private extern static bool InternetSetOption (int hInternet,
 int dwOption,
 ref INTERNET_CONNECTED_INFO lpBuffer,
 int dwBufferLength
 );

 [StructLayout(LayoutKind.Sequential)]
 struct INTERNET_CONNECTED_INFO
 {
  public int dwConnectedState;
  public int dwFlags;
 } ;

INTERNET_CONNECTED_INFO ci = new INTERNET_CONNECTED_INFO ();

// To set online use 1 for dwConnectedState member
ci.dwConnectedState = 0x10; //INTERNET_STATE_DISCONNECTED
ci.dwFlags = 1; //ISO_FORCE_DISCONNECTED

InternetSetOption (0, 50, ref ci, Marshal.SizeOf (ci)); //50 -
INTERNET_OPTION_CONNECTED_STATE

Hi!

How can I code the Work Offline function using Wininet and
InternetSetOption. I found some stuff in VB and Delphi but not in C# :-(

~Matt