[DllImport("iphlpapi.dll", SetLastError=true)]
static extern int EnableRouter(IntPtr pHandle, ref System.Threading.NativeOverlapped pOverlapped);
<DllImport("iphlpapi.dll", CharSet:=CharSet.Ansi)>
Public Shared Function EnableRouter(pHandle As IntPtr, ByRef pOverlapped As OVERLAPPED) As Integer
End Function
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VB.NET Example
Private Const ERROR_IO_PENDING As Integer = 997
<StructLayout(LayoutKind.Explicit, Size:=20)>
Public Structure OVERLAPPED
<FieldOffset(0)>
Public Internal As UInt32
<FieldOffset(4)>
Public InternalHigh As UInt32
<FieldOffset(8)>
Public Offset As UInt32
<FieldOffset(12)>
Public OffsetHigh As UInt32
<FieldOffset(8)>
Public Pointer As IntPtr
<FieldOffset(16)>
Public hEvent As IntPtr
End Structure
<DllImport("iphlpapi.dll", CharSet:=CharSet.Ansi)>
Public Shared Function EnableRouter(pHandle As IntPtr, ByRef pOverlapped As OVERLAPPED) As Integer
End Function
Private pOverlapped As OVERLAPPED
Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click
pOverlapped.hEvent = CreateEvent(IntPtr.Zero, False, False, "enablerouter")
Dim RetVal As Integer = EnableRouter(IntPtr.Zero, pOverlapped)
If RetVal = ERROR_IO_PENDING Then
Console.WriteLine("Success!")
Else
Dim errorMessage As String = New Win32Exception(RetVal).Message
Console.WriteLine("Error {0}", errorMessage)
End If
End Sub