Public Shared Function IsAvailable( _
   ByVal version As WiaVersion _
) As Boolean

Dim version As WiaVersion
Dim value As Boolean
 
value = WiaSession.IsAvailable(version)

public static bool IsAvailable( 
   WiaVersion version
)

public:
static bool IsAvailable( 
   WiaVersion version
) 

Public Sub IsAvailableExample(ByVal parent As IWin32Window)
   If (Not WiaSession.IsAvailable(WiaVersion.Version1)) Then
      MessageBox.Show("WIA version 1.0 not installed.")
      Return
   End If

   Dim session As WiaSession = New WiaSession()
   session.Startup(WiaVersion.Version1)

   Dim res As DialogResult = session.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault)
   If res <> DialogResult.OK Then
      MessageBox.Show("Error selecting WIA device.")
      session.Shutdown()
      Return
   End If

   ' Initialize and fill the required fields from the WiaAcquireOptions structure
   Dim wiaAcquireOptions As WiaAcquireOptions = wiaAcquireOptions.Empty
   wiaAcquireOptions.MemoryBufferSize = 32 * 1024
   wiaAcquireOptions.DoubleBuffer = True
   session.AcquireOptions = wiaAcquireOptions

   AddHandler session.AcquireEvent, AddressOf session_AcquireEvent

   session.Acquire(parent, Nothing, WiaAcquireFlags.ShowUserInterface Or WiaAcquireFlags.UseCommonUI)

   RemoveHandler session.AcquireEvent, AddressOf session_AcquireEvent
   session.Shutdown()
End Sub

Public Sub session_AcquireEvent(ByVal sender As Object, ByVal e As WiaAcquireEventArgs)
   Application.DoEvents()

   If (e.Flags And WiaAcquiredPageFlags.StartOfPage) = WiaAcquiredPageFlags.StartOfPage Then
      Console.WriteLine("Beginning of data transfer.")
   ElseIf (e.Flags And WiaAcquiredPageFlags.EndOfPage) = WiaAcquiredPageFlags.EndOfPage Then
      Console.WriteLine("End of data transfer.")
   End If

   If Not e.Image Is Nothing Then
      ' You can load the image here.
   End If

   e.Cancel = False
End Sub

public void IsAvailableExample(IWin32Window parent)
{
   if ( !WiaSession.IsAvailable(WiaVersion.Version1) )
   {
      MessageBox.Show("WIA version 1.0 not installed.");
      return;
   }

   WiaSession wiaSession = new WiaSession();
   wiaSession.Startup(WiaVersion.Version1);

   DialogResult res = wiaSession.SelectDeviceDlg(parent, WiaDeviceType.Default, WiaSelectSourceFlags.NoDefault);
   if(res != DialogResult.OK)
   {
      MessageBox.Show("Error selecting WIA device.");
      wiaSession.Shutdown();
      return;
   }

   // Initialize and fill the required fields from the WiaAcquireOptions structure
   WiaAcquireOptions wiaAcquireOptions = WiaAcquireOptions.Empty;
   wiaAcquireOptions.MemoryBufferSize = 32 * 1024;
   wiaAcquireOptions.DoubleBuffer = true;
   wiaSession.AcquireOptions = wiaAcquireOptions;

   wiaSession.AcquireEvent += new EventHandler<WiaAcquireEventArgs>(wiaSession_AcquireEvent);

   wiaSession.Acquire(parent, null, WiaAcquireFlags.ShowUserInterface | WiaAcquireFlags.UseCommonUI);

   wiaSession.AcquireEvent -= new EventHandler<WiaAcquireEventArgs>(wiaSession_AcquireEvent);
   wiaSession.Shutdown();
}

public void wiaSession_AcquireEvent(object sender, WiaAcquireEventArgs e)
{
   Application.DoEvents();

   if ((e.Flags & WiaAcquiredPageFlags.StartOfPage) == WiaAcquiredPageFlags.StartOfPage)
      Console.WriteLine("Beginning of data transfer.");
   else if ((e.Flags & WiaAcquiredPageFlags.EndOfPage) == WiaAcquiredPageFlags.EndOfPage)
      Console.WriteLine("End of data transfer.");

   if (e.Image != null)
   {
      // You can load the image here.
   }

   e.Cancel = false;
}