WIA in C# Redux: for Vista!

Of all the insanity! The scanning code I posted earlier does not work with the default configuration of Vista! Vista does not have the wiascr.dll file. However, it does have wiaaut.dll. Code I found at http://www.eggheadcafe.com/community/aspnet/2/76650/heres-some-sample-code.aspx finally gave me the answer after bashing my head around. It was easy to find code that worked for a WebCam, but nearly impossible to find code that worked for the scanner I was using. I guess no one out there uses scanners. Anyway, here's the modified code. Note that I added a ScannerException class--this just inherits the Exception class--nothing special about it:


///

/// This is a simple wrapper around WIA.
///

public class Scanner
{
public class AcquireEventArgs : EventArgs
{
public Image Image { get; internal set; }
}
WIA.DeviceManager manager = new WIA.DeviceManagerClass();

///

/// Acquires the images.
///

public void AcquireImages()
{
WIA.CommonDialogClass diag = new WIA.CommonDialogClass();
System.Object Object1 = null;
System.Object Object2 = null;
WIA.Device dev = null;
try
{
dev = diag.ShowSelectDevice(WIA.WiaDeviceType.UnspecifiedDeviceType, true, false);
}
catch (Exception ex)
{
if (ex.Message.EndsWith("00153.") || ex.Message.EndsWith("21006A."))
{
throw new ScannerException("Scanner Not connected", ex);
}
else
{
throw new ScannerException("Scanner problem", ex);
}

}
if (dev != null)
{


WIA.Item Item1 = ItemObjectReturnedFromInitializingScanner(ref dev);
WIA.ImageFile Image1 = new WIA.ImageFile();
WIA.ImageProcess ImageProcess1 = new WIA.ImageProcess();
Object1 = (Object)"Convert";
ImageProcess1.Filters.Add(ImageProcess1.FilterInfos.get_Item(ref Object1).FilterID, 0);
Object1 = (Object)"FormatID";
Object2 = (Object)WIA.FormatID.wiaFormatTIFF;
ImageProcess1.Filters[1].Properties.get_Item(ref Object1).set_Value(ref Object2);
Object1 = (Object)"Compression";
Object2 = (Object)"CCITT4";
ImageProcess1.Filters[1].Properties.get_Item(ref Object1).set_Value(ref Object2);
Object1 = null;
Object2 = null;


try
{
WIA.ImageFile imagefile = Item1.Transfer(WIA.FormatID.wiaFormatTIFF) as WIA.ImageFile;

if (ImageScanned != null)
{
AcquireEventArgs e = new AcquireEventArgs();
using (MemoryStream ms = new MemoryStream((byte[])imagefile.FileData.get_BinaryData()))
{
e.Image = new Bitmap(ms);
}
ImageScanned(this, e);
}
}
catch (Exception ex)
{
throw new ScannerException("Problem with Scanner", ex);
}
}
}

private WIA.Item ItemObjectReturnedFromInitializingScanner(ref WIA.Device Scanner)
{
WIA.Item Item1 = null;
Object Object1 = null;
Object Object2 = null;
Int32 DPI = 200;
foreach (WIA.Item CurrentItem in Scanner.Items) // 'Scanner settings.
{

Item1 = CurrentItem;
try
{
Object1 = (Object)"6146";
Object2 = (Object)4;
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }
try
{
Object1 = (Object)"6147";
Object2 = (Object)DPI;
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }
try
{
Object1 = (Object)"6148";
Object2 = (Object)DPI;
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }
try
{
Object1 = (Object)"6149";
Object2 = (Object)0;
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }
try
{
Object1 = (Object)"6150";
Object2 = (Object)0;
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }
try
{
Object1 = (Object)"6151";
Object2 = (Object)(8.5 * DPI);
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }
try
{
Object1 = (Object)"6152";
Object2 = (Object)(11.5 * DPI);
CurrentItem.Properties.get_Item(ref Object1).set_Value(ref Object2);
}
catch
{ }

foreach (WIA.Property Prop in Scanner.Properties)
{
if (Prop.PropertyID == 3088) //
{
try
{
Object1 = (Object)5;
Prop.set_Value(ref Object1); //'This is my effort to enforce duplex. I
}
catch (Exception) { }
}
}
}
Object1 = null;
Object2 = null;
return Item1;
}

///

/// Occurs when [image scanned].
///

public event EventHandler ImageScanned;


}