Windows image acquisition automation layer

Device = Новый COMОбъект("WIA.DeviceManager");
Количество = Device.DeviceInfos.Count;
oDevice = Новый Массив(Количество);
Для К=1 По Количество Цикл
    Если Device.DeviceInfos(к).Type = 3 Тогда
        Попытка
            oDevice[к-1] = Device.DeviceInfos(к).Connect();
        Исключение
            oDevice[к-1] = Неопределено;
        КонецПопытки;
    Иначе
        oDevice[к-1] = Неопределено;
    КонецЕсли;
КонецЦикла;
    
Для К = 1 По Количество Цикл
    Если oDevice[к-1] <> Неопределено Тогда
        Item = oDevice[к-1].ExecuteCommand("{AF933CAC-ACAD-11D2-A093-00C04F72DC3C}");
        Image = Item.Transfer("{557CF401-1A04-11D3-9A73-0000F81EF32E}");
        Image.SaveFile("D:\aaa.jpg");
    КонецЕсли;
КонецЦикла;

//-----------------------------------------------------------------------------
// scr_ScanUtils
//-----------------------------------------------------------------------------
 
// Device Types
var UnspecifiedDeviceType = 0;
var ScannerDeviceType = 1;
var CameraDeviceType = 2;
var VideoDeviceType = 3;
 
// Commands
var wiaCommandSynchronize = '{9B26B7B2-ACAD-11D2-A093-00C04F72DC3C}';
var wiaCommandTakePicture = '{AF933CAC-ACAD-11D2-A093-00C04F72DC3C}';
var wiaCommandDeleteAllItems = '{E208C170-ACAD-11D2-A093-00C04F72DC3C}';
var wiaCommandChangeDocument = '{04E725B0-ACAE-11D2-A093-00C04F72DC3C}';
var wiaCommandUnloadDocument = '{1F3B3D8E-ACAE-11D2-A093-00C04F72DC3C}';

// Picture formats
var wiaFormatBMP = '{B96B3CAB-0728-11D3-9D7B-0000F81EF32E}';
var wiaFormatPNG = '{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}';
var wiaFormatGIF = '{B96B3CB0-0728-11D3-9D7B-0000F81EF32E}';
var wiaFormatJPEG = '{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}';
var wiaFormatTIFF = '{B96B3CB1-0728-11D3-9D7B-0000F81EF32E}';

// Группа "Все файлы"
var RootFilesGroup = '{F03EDFB0-C246-4A9D-B0E4-DA8C8B3DD338}';

function ConvertImageFile(ImageFile, Format) {
        var IP = System.CreateObject("Wia.ImageProcess");
        IP.Filters.Add(IP.FilterInfos("Convert").FilterID);    
        IP.Filters(1).Properties("FormatID").Value = Format;
        var Img = IP.Apply(ImageFile);
        return Img;
}

// Сканирование без диалоговых окон на сканер по-умолчанию
function SilentScan(FileName) {
        try {
                System.BeginProcessing();
                var Device;
                var Dialog = System.CreateObject("WIA.CommonDialog");
                var DeviceManager = System.CreateObject("WIA.DeviceManager");
                var Count = DeviceManager.DeviceInfos.Count;
                for(var j = 1; j <= Count; j++) {
                        var DeviceInfo = DeviceManager.DeviceInfos.Item(j);
                        if (DeviceInfo.Type == ScannerDeviceType) {
                                Device = DeviceInfo.Connect();
                                break;
                        }
                }
            if (!Assigned(Device)) {
                        Log.Write(2, "Сканер не обнаружен.");
                        return;
                }
                if ((Assigned(Device.Items)) && (Assigned(Device.Items.Item(1)))) {
                        var item = Device.Items.Item(1);
                        try {
                                var Intent = 1; // цветная печать
                                /* Параметры сканирования */
                                var Properties = item.Properties;
                                for (var i = 1; i <= Properties.Count; i++) {
                                        var PropItem = Properties.Item(i);
                                        switch(PropItem.PropertyID) {
                                                /* Horizontal Resolution */
                                                case 6147: PropItem.Value = 150;
                                                        break;
                                                /* Vertical Resolution */
                                                case 6148: PropItem.Value = 150;
                                                        break;
                                                /* Horizontal Starting Position (Scanning Area) */
                                                case 6149: PropItem.Value = 0;
                                                        break;
                                                /* Vertical Starting Position (Scanning Area) */
                                                case 6150: PropItem.Value = 0;
                                                        break;
                                                /* Current Intent */
                                                case 6146: PropItem.Value = Intent;
                                                        break;
                                        }
                                }
                                /* Старт сканирования */
                                var imageFile = Dialog.ShowTransfer(item);
                            if (Assigned(imageFile)) {
                                if (CheckFileExists(FileName)) {
                                        FileName = GetTemporaryFileName(ShortFileName, false)
                                }
                                /* Преобразование полученного файла в jpeg */
                                var WIAFormat = wiaFormatJPEG;
                                var Img = ConvertImageFile(imageFile, WIAFormat);
                                Img.SaveFile(FileName);
                            }
                        } catch(e) {
                                Log.Write(2, "При сканировании произошла ошибка. Попробуйте, пожалуйста, еще раз.");
                        }
                } else {
                        Log.Write(2, "При инициализации произошла ошибка.");            
                }
        } finally {
                System.EndProcessing();
        }
}

function Main() {
        SilentScan("c:\\temp\\Test.jpg");
}

Windows Image Acquisition (WIA) is the still image acquisition platform in the Windows family of operating systems starting with Windows Millennium Edition (Windows Me) and Windows XP.

• Introduction
• Benefits of Windows Image Acquisition 2.0
  • For Application Writers
  • For Device Manufactures
  • For Scanner Users
• Development of Windows Image Acquisition
• Overview of Windows Image Acquisition
• Facts about Windows Image Acquisition 2.0
• Developer Audience
• Run-Time Requirements
• WIA Topics

Introduction

The WIA platform enables imaging/graphics applications to interact with imaging hardware and standardizes the interaction between different applications and scanners.
This allows those different applications to talk to and interact with those different scanners without requiring the application writers and scanner manufactures to customize their application or drivers for each application-device combination.

Картинка с сайта: web.archive.org

Benefits of Windows Image Acquisition 2.0

WIA provides benefits to application developers, device manufacturers, and scanner users who need to interact with imaging hardware.

For Application Writers

• Windows runs a certification process for WIA drivers so WIA applications are guaranteed to be base-level compatible with all WIA-based scanners.
• WIA drivers are loaded in the WIA service process, thus providing a more stable driver environment.
• Applications can be initiated from the scanner scan button via push events supported by the WIA subsystem.
• The WIA includes a default segmentation filter that all drivers can take advantage of; this way, applications do not have to write code for multi-region scanning for purposes such as separating out a large number of photos spread over a flatbed scanner.

For Device Manufactures

• WIA driver certification process helps driver developers in establishing that their driver is WIA-compliant.
• WIA drivers can take advantage of a built-in segmentation filter, image processing filter and error handler, if they choose to do so.
• WIA-based scanners work right out of the box on Windows with Windows scanning applications such as Windows Fax and Scan and Paint.
• WIA drivers offer better integration with Windows such as the full device experience.
• Windows Vista release includes a WSD-WIA class driver that enables all devices compliant with Web Services for Scanner (WS-Scan) protocol to work with WIA applications without any additional driver or software.

For Scanner Users

• WIA-based scanners can be used from Windows applications such Windows Fax and Scan and Paint without the need for any additional software.
• WIA-based applications and scanners can also take advantage of WIA add-ons such as the segmentation filter which enables such features as processing a number of pictures on the scanner and scanning them all to individual files without user intervention.
• WIA-based devices offers a much better integration with other Windows features such as the Device Stage feature for Windows 7.
• WIA provides a more robust, stable and reliable scanning experience by isolating the driver and the application.

Development of Windows Image Acquisition

The imaging architecture in Windows 2000 and Windows 95 or later consisted of a low-level hardware abstraction, Still Image Architecture (STI), and a high-level set of APIs known as TWAIN.
In Windows XP and Windows Me WIA was introduced. WIA is an imaging architecture that builds on STI and does not require TWAIN, although TWAIN is still supported alongside WIA.

WIA 1.0 was introduced in Windows Me and Windows XP and supports scanners, digital cameras and digital video equipment.
WIA 2.0 was released with Windows Vista. WIA 2.0 is targeted towards scanners but continues to offer support for legacy WIA 1.0 applications and devices through a WIA 1.0 to WIA 2.0 compatibility layer provided by the WIA service.
However, video content support was removed from WIA for Windows Vista.
We recommend Windows Portable Devices (WPD) API for digital cameras and digital video equipment in the future.
WIA 1.0 as well as STI TWAIN drivers are still supported directly on Windows Vista and Windows 7 alongside native WIA 2.0 device drivers and imaging applications.

Overview of Windows Image Acquisition

WIA provides a framework that allows a device to present its unique capabilities to the operating system and allows imaging applications to invoke those unique capabilities.

The WIA platform includes a data acquisition protocol, a Device Driver Model and Interface (DDI), an API and a dedicated WIA service.
The platform also includes a set of built-in kernel mode drivers that support communication with imaging devices locally connected through USB, serial/parallel, SCSI and FireWire interfaces.
The WIA subsystem also includes a transparent compatibility layer which allows TWAIN compatible applications to employ and use WIA-driver-based devices.

Network connected imaging devices that support Web Services for Devices (WSD) protocol can also be used from WIA-compliant imaging applications on Windows Vista and Windows 7 out of the box via a WSD-WIA class driver that shipped as part of Windows Vista.
The class driver converts WIA calls to WSD calls and vice versa and makes already existing WIA applications work with WSD based scanners without any additional driver.

WIA drivers are made up of a user interface (UI) component and a core driver component, loaded into two different process spaces: UI in the application space and the driver core in the WIA service space.
The service runs in Local System context in Windows XP and runs in Local Service context starting with Windows Server 2003 and Windows Vista for enhanced security against buggy or malicious drivers.

Картинка с сайта: web.archive.org

The WIA API set exposes imaging applications to still image acquisition hardware functionality by providing support for:

• Enumeration of available image acquisition devices.
• Creating connections to multiple devices simultaneously.
• Querying properties of devices in a standard and expandable manner.
• Acquiring device data by using standard and high performance transfer mechanisms.
• Maintaining image properties across data transfers.
• Notification of device status and scan event handling.

Windows added scripting support to WIA by releasing the WIA Automation Library in 2002 that was incorporated in Windows Vista as Windows Image Acquisition (WIA) Automation Layer and continues to be a part of Windows 7.
The WIA Automation Library provides end-to-end image acquisition capabilities to automation-enabled application development environments and programming languages such as Microsoft Visual Basic 6.0, Active Server Pages (ASP), VBScript and C#.

For Windows 7, WIA APIs have additional support to complement the already existing push-scanning support.

• Auto-configured device initiated scanning with scan parameters configured at the scanner on the device front panel.
• Automatic source selection for device-initiated scan.

Facts about Windows Image Acquisition 2.0

• The data transfer mechanism in WIA 2.0 is stream based.
  The stream abstraction removes the distinction between different transfer types and also allows exchange of mutually agreed-upon metadata between device and application.
• WIA 2.0 subsystem also includes a basic image processing filter driver add-on that is optionally replaceable by the scanner driver, if the driver chooses to provide a customized image processing filter.
  The built-in filter enables post processing of images acquired through the scanner.
  Image processing filter also enables live software previews when small settings such as brightness and contrast are adjusted.
• The segmentation filter is another handy WIA component that can be replaced by a more customized filter by the scanner driver.
  The segmentation filter can be used for multi-region scanning.
  Multi-region scanning, as an example, allows an application to automatically detect different scan regions without any user intervention, such as identifying a bunch of photos lying randomly on the scanner flatbed.
• WIA 2.0 provides a replaceable/extensible error handler to gracefully handle, and possibly recover from, software, hardware and configuration errors and delays.
  The error handler is another WIA component that can be replaced with a more customized version by the scanner driver.
  This extension provides status and error messages during data acquisitions such as «Lamp warming up,» «Cover open,» «Paper jam,» and so on.
  This extension also allows cleaner support for «Cancel operations.»

Developer Audience

The WIA API is designed for use by C/C++ programmers. Familiarity with the Windows  GUI and Component Object Model (COM) interfaces is required.

For developers familiar with Microsoft Visual Basic 6.0, Active Server Pages (ASP), or scripting, WIA provides an automation layer for Windows XP Service Pack 1 (SP1) or later that builds upon and simplifies access to the foundation provided by C/C++.
For information about the automation layer, see Windows Image Acquisition Automation Layer.

Note  The WIA Automation Layer supersedes Windows Image Acquisition (WIA) 1.0 scripting.

Run-Time Requirements

Applications that use the WIA API require Windows XP or later.

WIA Topics

The WIA topics are organized as shown in the following table.

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Dim Img 'As ImageFile
Dim IP 'As ImageProcess

Set Img = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"

IP.Filters.Add IP.FilterInfos("RotateFlip").FilterID
IP.Filters(1).Properties("RotationAngle") = 90

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\Bliss90.bmp"

Dim Img 'As ImageFile
Dim IP 'As ImageProcess

Set Img = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"

IP.Filters.Add IP.FilterInfos("Crop").FilterID
IP.Filters(1).Properties("Left") = Img.Width \ 4
IP.Filters(1).Properties("Top") = Img.Height \ 4
IP.Filters(1).Properties("Right") = Img.Width \ 4
IP.Filters(1).Properties("Bottom") = Img.Height \ 4

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\BlissCrop.bmp"

Dim Img 'As ImageFile
Dim IP 'As ImageProcess

Set Img = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"

IP.Filters.Add IP.FilterInfos("Scale").FilterID
IP.Filters(1).Properties("MaximumWidth") = 100
IP.Filters(1).Properties("MaximumHeight") = 100

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\BlissThumb.bmp"

Dim Thumb 'As ImageFile
Dim Img 'As ImageFile
Dim IP 'As ImageProcess

Set Img = CreateObject("WIA.ImageFile")
Set Thumb = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"
Thumb.LoadFile "C:\WINDOWS\Web\Wallpaper\BlissThumb.bmp"

IP.Filters.Add IP.FilterInfos("Stamp").FilterID
Set IP.Filters(1).Properties("ImageFile") = Thumb
IP.Filters(1).Properties("Left") = Img.Width - Thumb.Width
IP.Filters(1).Properties("Top") = Img.Height - Thumb.Height

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\BlissStamp.bmp"

Dim Img 'As ImageFile
Dim IP 'As ImageProcess
Dim v 'As Vector

Set Img = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")
Set v = CreateObject("WIA.Vector")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Autumn.jpg"

IP.Filters.Add IP.FilterInfos("Exif").FilterID
IP.Filters(1).Properties("ID") = 40091
IP.Filters(1).Properties("Type") = VectorOfBytesImagePropertyType

v.SetFromString "This Title tag written by Windows Image Acquisition Library v2.0"

IP.Filters(1).Properties("Value") = v

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\AutumnExif.jpg"

Dim Img 'As ImageFile
Dim Page2 'As ImageFile
Dim Page3 'As ImageFile
Dim IP 'As ImageProcess
Dim v 'As Vector

Set Img = CreateObject("WIA.ImageFile")
Set Page2 = CreateObject("WIA.ImageFile")
Set Page3 = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"
Page2.LoadFile "C:\WINDOWS\Web\Wallpaper\Azul.jpg"
Page3.LoadFile "C:\WINDOWS\Web\Wallpaper\Autumn.jpg"

IP.Filters.Add IP.FilterInfos("Frame").FilterID
Set IP.Filters(IP.Filters.Count).Properties("ImageFile") = Page2

IP.Filters.Add IP.FilterInfos("Frame").FilterID
Set IP.Filters(IP.Filters.Count).Properties("ImageFile") = Page3

IP.Filters.Add IP.FilterInfos("Convert").FilterID
IP.Filters(IP.Filters.Count).Properties("FormatID") = wiaFormatTIFF

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\Bliss.tif"

Img.ActiveFrame = Img.FrameCount

Set v = Img.ARGBData

Set Img = v.ImageFile(Img.Width, Img.Height)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\Autumn.bmp"

Dim Img 'As ImageFile
Dim IP 'As ImageProcess
Dim v 'As Vector
Dim i 'As Long

Set Img = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"

Set v = Img.ARGBData

For i = 1 To v.Count Step 21
    v(i) = &HFFFF00FF 'opaque pink (A=255,R=255,G=0,B=255)
Next

IP.Filters.Add IP.FilterInfos("ARGB").FilterID
Set IP.Filters(1).Properties("ARGBData") = v

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\BlissARGB.bmp"

Dim Img 'As ImageFile
Dim IP 'As ImageProcess

Set Img = CreateObject("WIA.ImageFile")
Set IP = CreateObject("WIA.ImageProcess")

Img.LoadFile "C:\WINDOWS\Web\Wallpaper\Bliss.bmp"

IP.Filters.Add IP.FilterInfos("Convert").FilterID
IP.Filters(1).Properties("FormatID").Value = wiaFormatJPEG
IP.Filters(1).Properties("Quality").Value = 5

Set Img = IP.Apply(Img)

Img.SaveFile "C:\WINDOWS\Web\Wallpaper\BlissCompressed.jpg"


3、Getting Started with Samples

All the example code contained in the Windows Image Acquisition (WIA) Automation Layer 2.0 reference works in multiple languages. This way you can copy the examples from the reference pages into any of the following:

• Visual Basic 6.0
• Windows Script Host
• HTML Application
• Script in an HTML Application
• Active Server Pages

Visual Basic 6.0

To create a Microsoft Visual Basic project for any of the examples in the reference topics, perform the following steps.

1. Start the Visual Basic Development Environment.
2. Select Standard EXE.
3. Click Components from the Project menu (or press Ctrl-T).
4. Scroll down and select Microsoft Windows Image Acquisition Library v2.0 by placing a checkmark in front of it. Of the three new controls that appear on in the Toolbox, double click CommonDialog and DeviceManager to add them to your form.

Note  The data types are commented out in the examples in the reference pages so you can copy and paste them into Microsoft Visual Basic Scripting Edition (VBScript) where all data types are a Variant. Visual Basic programmers should remove the comment mark (‘) in front of each data type.

Windows Script Host

To create a Windows Script Host project, copy the following into an empty file with a .wsf extension.

<job>
<reference object="WIA.DeviceManager" />
<object id="DeviceManager1" progid="WIA.DeviceManager" />
<object id="CommonDialog1" progid="WIA.CommonDialog" />
<script language="VBScript">

'Paste Sample Code Here

</script>
</job>

HTML Application

To create an HTML Application (HTA), copy the following into an empty file with an .hta extension. In addition, if you have not done so already, create the Visual Basic Script Constants file.

<html>
<title>Sample HTA</title>
<hta:application id="oHTA"/>
<object ID="DeviceManager1" Width=0 Height=0 ClassID="CLSID:E1C5D730-7E97-4D8A-9E42-BBAE87C2059F"></object>
<object ID="CommonDialog1" Width=0 Height=0 ClassID="CLSID:850D1D11-70F3-4BE5-9A11-77AA6B2BB201"></object>
<script language="vbscript" src="wiaaut.vbs"></script>
<script language="vbscript">

'Paste Sample Code Here

</script>
</head>
<body scroll="no">
</body>
</html>

Script in an HTML Application

To create an HTML file with script, copy the following into an empty file with an .htm extension. In addition, if you have not done so already, create the Visual Basic Script Constants file.

Note  Since the Windows Image Acquisition (WIA) Library is not marked safe for scripting, proper functionality is dependent on your security settings.

<html>
<title>Sample HTML</title>
<object ID="DeviceManager1" Width=0 Height=0 ClassID="CLSID:E1C5D730-7E97-4D8A-9E42-BBAE87C2059F"></object>
<object ID="CommonDialog1" Width=0 Height=0 ClassID="CLSID:850D1D11-70F3-4BE5-9A11-77AA6B2BB201"></object>
<script language="vbscript" src="wiaaut.vbs"></script>
<script language="vbscript">

'Paste Sample Code Here

</script>
</head>
<body>
</body>
</html>

Active Server Pages

To create an Active Server Page, copy the following into an empty file with an .asp extension.

Note  The script on Active Server Pages (ASP) runs on a non-interactive desktop so using the CommonDialog or VideoPreview control in an Active Server Page will not work as expected. In addition, in the interest of increased security, the default Server Security Settings needs to be adjusted before you can successfully create a DeviceManager object. For instructions on changing your security settings, see How to Configure Security Settings. Also, for security reasons you need to change any calls to the Visual Basic function CreateObject to instead use Server.CreateObject.

<%@ Language=VBScript %>
<!--METADATA TYPE="TypeLib" UUID="94A0E92D-43C0-494E-AC29-FD45948A5221"-->
<% 

'Paste Sample Code Here

%>

4、Shared Samples

参考：http://msdn.microsoft.com/en-us/library/windows/desktop/ms630826(v=vs.85).aspx

5、Visual Basic Script Constants

When using the Windows Image Acquisition (WIA) Library from an HTML Page or HTML Application (HTA) as illustrated in the examples, you need a file named Wiaaut.vbs that contains the following Microsoft Visual Basic Scripting Edition (VBScript) code. For more information about each of these constants and enumerated types, see the reference topics.

' Miscellaneous

Const wiaIDUnknown = "{00000000-0000-0000-0000-000000000000}"
Const wiaAnyDeviceID = "*"

' FormatID

Const wiaFormatBMP = "{B96B3CAB-0728-11D3-9D7B-0000F81EF32E}"
Const wiaFormatPNG = "{B96B3CAF-0728-11D3-9D7B-0000F81EF32E}"
Const wiaFormatGIF = "{B96B3CB0-0728-11D3-9D7B-0000F81EF32E}"
Const wiaFormatJPEG = "{B96B3CAE-0728-11D3-9D7B-0000F81EF32E}"
Const wiaFormatTIFF = "{B96B3CB1-0728-11D3-9D7B-0000F81EF32E}"

' EventID

Const wiaEventDeviceConnected = "{A28BBADE-64B6-11D2-A231-00C04FA31809}"
Const wiaEventDeviceDisconnected = "{143E4E83-6497-11D2-A231-00C04FA31809}"
Const wiaEventItemCreated = "{4C8F4EF5-E14F-11D2-B326-00C04F68CE61}"
Const wiaEventItemDeleted = "{1D22A559-E14F-11D2-B326-00C04F68CE61}"
Const wiaEventScanImage = "{A6C5A715-8C6E-11D2-977A-0000F87A926F}"
Const wiaEventScanPrintImage = "{B441F425-8C6E-11D2-977A-0000F87A926F}"
Const wiaEventScanFaxImage = "{C00EB793-8C6E-11D2-977A-0000F87A926F}"
Const wiaEventScanOCRImage = "{9D095B89-37D6-4877-AFED-62A297DC6DBE}"
Const wiaEventScanEmailImage = "{C686DCEE-54F2-419E-9A27-2FC7F2E98F9E}"
Const wiaEventScanFilmImage = "{9B2B662C-6185-438C-B68B-E39EE25E71CB}"
Const wiaEventScanImage2 = "{FC4767C1-C8B3-48A2-9CFA-2E90CB3D3590}"
Const wiaEventScanImage3 = "{154E27BE-B617-4653-ACC5-0FD7BD4C65CE}"
Const wiaEventScanImage4 = "{A65B704A-7F3C-4447-A75D-8A26DFCA1FDF}"

' CommandID

Const wiaCommandSynchronize = "{9B26B7B2-ACAD-11D2-A093-00C04F72DC3C}"
Const wiaCommandTakePicture = "{AF933CAC-ACAD-11D2-A093-00C04F72DC3C}"
Const wiaCommandDeleteAllItems = "{E208C170-ACAD-11D2-A093-00C04F72DC3C}"
Const wiaCommandChangeDocument = "{04E725B0-ACAE-11D2-A093-00C04F72DC3C}"
Const wiaCommandUnloadDocument = "{1F3B3D8E-ACAE-11D2-A093-00C04F72DC3C}"

' WiaSubType enumeration

Const UnspecifiedSubType = 0
Const RangeSubType = 1
Const ListSubType = 2
Const FlagSubType = 3

' WiaDeviceType enumeration

Const UnspecifiedDeviceType = 0
Const ScannerDeviceType = 1
Const CameraDeviceType = 2
Const VideoDeviceType = 3

' WiaItemFlag enumeration

Const FreeItemFlag = &h0
Const ImageItemFlag = &h1
Const FileItemFlag = &h2
Const FolderItemFlag = &h4
Const RootItemFlag = &h8
Const AnalyzeItemFlag = &h10
Const AudioItemFlag = &h20
Const DeviceItemFlag = &h40
Const DeletedItemFlag = &h80
Const DisconnectedItemFlag = &h100
Const HPanoramaItemFlag = &h200
Const VPanoramaItemFlag = &h400
Const BurstItemFlag = &h800
Const StorageItemFlag = &h1000
Const TransferItemFlag = &h2000
Const GeneratedItemFlag = &h4000
Const HasAttachmentsItemFlag = &h8000
Const VideoItemFlag = &h10000
Const RemovedItemFlag = &h80000000

' WiaPropertyType enumeration

Const UnsupportedPropertyType = 0
Const BooleanPropertyType = 1
Const BytePropertyType = 2
Const IntegerPropertyType = 3
Const UnsignedIntegerPropertyType = 4
Const LongPropertyType = 5
Const UnsignedLongPropertyType = 6
Const ErrorCodePropertyType = 7
Const LargeIntegerPropertyType = 8
Const UnsignedLargeIntegerPropertyType = 9
Const SinglePropertyType = 10
Const DoublePropertyType = 11
Const CurrencyPropertyType = 12
Const DatePropertyType = 13
Const FileTimePropertyType = 14
Const ClassIDPropertyType = 15
Const StringPropertyType = 16
Const ObjectPropertyType = 17
Const HandlePropertyType = 18
Const VariantPropertyType = 19
Const VectorOfBooleansPropertyType = 101
Const VectorOfBytesPropertyType = 102
Const VectorOfIntegersPropertyType = 103
Const VectorOfUnsignedIntegersPropertyType = 104
Const VectorOfLongsPropertyType = 105
Const VectorOfUnsignedLongsPropertyType = 106
Const VectorOfErrorCodesPropertyType = 107
Const VectorOfLargeIntegersPropertyType = 108
Const VectorOfUnsignedLargeIntegersPropertyType = 109
Const VectorOfSinglesPropertyType = 110
Const VectorOfDoublesPropertyType = 111
Const VectorOfCurrenciesPropertyType = 112
Const VectorOfDatesPropertyType = 113
Const VectorOfFileTimesPropertyType = 114
Const VectorOfClassIDsPropertyType = 115
Const VectorOfStringsPropertyType = 116
Const VectorOfVariantsPropertyType = 119

' WiaImagePropertyType enumeration

Const UndefinedImagePropertyType = 1000
Const ByteImagePropertyType = 1001
Const StringImagePropertyType = 1002
Const UnsignedIntegerImagePropertyType = 1003
Const LongImagePropertyType = 1004
Const UnsignedLongImagePropertyType = 1005
Const RationalImagePropertyType = 1006
Const UnsignedRationalImagePropertyType = 1007
Const VectorOfUndefinedImagePropertyType = 1100
Const VectorOfBytesImagePropertyType = 1101
Const VectorOfUnsignedIntegersImagePropertyType = 1102
Const VectorOfLongsImagePropertyType = 1103
Const VectorOfUnsignedLongsImagePropertyType = 1104
Const VectorOfRationalsImagePropertyType = 1105
Const VectorOfUnsignedRationalsImagePropertyType = 1106

' WiaEventFlag enumeration

Const NotificationEvent = 1
Const ActionEvent = 2

' WiaImageIntent enumeration

Const UnspecifiedIntent = 0
Const ColorIntent = 1
Const GrayscaleIntent = 2
Const TextIntent = 4

' WiaImageBias enumeration

Const MinimizeSize = 65536
Const MaximizeQuality = 131072

6、Objects

7、Constants and Enumerations

以上来自：http://msdn.microsoft.com/en-us/library/windows/desktop/ms630827(v=vs.85).aspx

WIA下载：http://www.microsoft.com/en-us/download/details.aspx?id=18287

Additional information

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Applications that use WIA

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1. ^ «Windows Image Acquisition (WIA)». MSDN Library. msdn.microsoft.com. Retrieved 14 January 2013.
2. ^ List of Scanners That Are Supported by Windows Image Acquisition for Windows XP
3. ^ List of Digital Cameras That Are Supported by Windows Image Acquisition
4. ^ Microsoft published a paper in 2003 titled Security-related Best Practices for WIA Driver Development to assist WIA driver developers in writing drivers that will work in the lower-security context that the WIA service operates in.
5. ^ Still Image Connectivity for Windows
6. ^ Migrating from WIA to WPD