<DllImport(LIBUSB_NATIVE_LIBRARY, CallingConvention:=CALLING_CONVENTION, _
      ExactSpelling:=True), SuppressUnmanagedCodeSecurity()> _
    Public Shared Function usb_open(ByVal dev As usb_device) As IntPtr
    End Function
 
    <DllImport(LIBUSB_NATIVE_LIBRARY, CallingConvention:=CALLING_CONVENTION, _
      ExactSpelling:=True), SuppressUnmanagedCodeSecurity()> _
    Public Shared Function usb_claim_interface(ByVal dev As IntPtr, ByVal _
    interfaceNum As Integer) As Integer
    End Function
 
 
 
Private deviceHandle As IntPtr = IntPtr.Zero
deviceHandle = NativeMethods.usb_open(descriptor.NativeDevice)
usb_claim_interface(deviceHandle , 0)
 
/code]
 
Wenn ich das dann aber so abändere:
 
<pre><code>    <DllImport(LIBUSB_NATIVE_LIBRARY, _
  CallingConvention:=CALLING_CONVENTION, ExactSpelling:=True), _
  SuppressUnmanagedCodeSecurity()> _
    Public Shared Function usb_claim_interface(ByRef dev As IntPtr, ByVal _
    interfaceNum As Integer) As Integer
    End Function