| Member | Description | 
|---|
| ACAP_AUDIOFILEFORMAT | Informs the application which audio file formats the Source can generate or tells the Source which audio file formats the application can handle. Uses ImGearAudioFormats values. | 
| ACAP_XFERMECH | Allows the Application and Source to identify which audio transfer mechanisms they have in common. | 
| CAP_ALARMS | Turns specific audible alarms on and off. Uses ImGearAlarms values. | 
| CAP_ALARMVOLUME | The volume of a device’s audible alarm. Note that this control affects the volume of all
            alarms; no specific volume control for individual types of alarms is provided. | 
| CAP_AUTHOR | The name or other identifying information about the Author of the image. 
            It may include a copyright string. | 
| CAP_AUTOFEED | Set to TRUE to enable Source’s automatic feeding. | 
| CAP_AUTOMATICCAPTURE | The number of images to automatically capture. This does not refer to the number of images
            to be sent to the Application, use CAP_XFERCOUNT for that. | 
| CAP_AUTOSCAN | Enables the source’s automatic document scanning process. | 
| CAP_BATTERYMINUTES | The minutes of battery power remaining on a device. | 
| CAP_BATTERYPERCENTAGE | Indicates battery power status. | 
| CAP_CAMERAPREVIEWUI | Queries the source for UI support for preview mode. | 
| CAP_CAPTION | A general note about the acquired image. | 
| CAP_CLEARBUFFERS | Getting this reports the presence of data in the scanner’s buffers. Setting with a value of ImGearClearBuffers.CLEAR immediately clears the buffers. Uses ImGearClearBuffers values. | 
| CAP_CLEARPAGE | Set to TRUE to eject current page and leave acquire area empty. | 
| CAP_CUSTOMBASE | Base of custom capabilities. | 
| CAP_CUSTOMDSDATA | Allows the application to query the data source to see if it supports the new operation triplets
            DG_CONTROL/DAT_CUSTOMDSDATA/MSG_GET and DG_CONTROL/DAT_CUSTOMDSDATA/MSG_SET. | 
| CAP_DEVICEEVENT | Selects which events the application wants the source to report. Uses ImGearDeviceEvents values. | 
| CAP_DEVICEONLINE | Determines if hardware is on and ready. | 
| CAP_DEVICETIMEDATE | Date and time of a device’s clock. | 
| CAP_DUPLEX | This indicates whether the scanner supports duplex. If so, it further indicates whether one-path or two-path duplex is supported. Uses ImGearDuplex values. | 
| CAP_DUPLEXENABLED | The user can set the duplex option to be TRUE or FALSE. If TRUE, the scanner scans both sides 
            of a paper; otherwise, the scanner will scan only one side of the image. | 
| CAP_ENABLEDSUIONLY | Queries an application to see if it implements the new user interface settings dialog. | 
| CAP_ENDORSER | Allows the application to specify the starting endorser / imprinter number. | 
| CAP_EXTENDEDCAPS | Capabilities negotiated in States 5 & 6. | 
| CAP_FEEDERALIGNMENT | If TRUE, feeder is centered; FALSE if it is free-floating. Uses ImGearFeederAlignment values. | 
| CAP_FEEDERENABLED | If TRUE, Source’s feeder is available. | 
| CAP_FEEDERLOADED | If TRUE, Source has documents loaded in feeder (get only). | 
| CAP_FEEDERORDER | Specifies whether feeder starts with top of first or last page. Uses ImGearFeederOrder values. | 
| CAP_FEEDPAGE | Set to TRUE to eject current page and feed next page. | 
| CAP_INDICATORS | Use the Source’s progress indicator? (valid only when ShowUI==FALSE). | 
| CAP_JOBCONTROL | Allows multiple jobs in batch mode. | 
| CAP_LANGUAGE | Allows application and source to identify which languages they have in common. Uses ImGearLanguages values. | 
| CAP_MAXBATCHBUFFERS | Describes the number of pages that the scanner can buffer when CAP_AUTOSCAN is enabled. Uses ImGearClearBuffers values. | 
| CAP_PAPERDETECTABLE | Determines whether source can detect documents on the ADF or flatbed. | 
| CAP_POWERSUPPLY | Get reports the kinds of power available; Current reports the current power supply to use. Uses ImGearPowerSupply values. | 
| CAP_PRINTER | Gets current list of available printer devices; sets the device for negotiation. Uses ImGearPrinter values. | 
| CAP_PRINTERENABLED | Turns the current CAP_PRINTER device on or off. | 
| CAP_PRINTERINDEX | Starting number for the CAP_PRINTER device. | 
| CAP_PRINTERMODE | Specifies appropriate current CAP_PRINTER device mode. Uses ImGearPrinterModes values. | 
| CAP_PRINTERSTRING | String(s) to be used in the string component when CAP_PRINTER device is enabled. | 
| CAP_PRINTERSUFFIX | String to be used as current CAP_PRINTER device’s suffix. | 
| CAP_REACQUIREALLOWED | Undocumented TWAIN capability. | 
| CAP_REWINDPAGE | Set to TRUE to do a reverse feed. | 
| CAP_SERIALNUMBER | The serial number of the currently selected source device. | 
| CAP_SUPPORTEDCAPS | Inquire valid capabilities for Source. | 
| CAP_SUPPORTEDCAPSEXT | Undocumented TWAIN capability. | 
| CAP_THUMBNAILSENABLED | Allows an application to request the delivery of thumbnail representations for the set of
            images that are to be delivered. | 
| CAP_TIMEBEFOREFIRSTCAPTURE | Selects the number of seconds before the first picture taken. | 
| CAP_TIMEBETWEENCAPTURES | Selects the hundredths of a second to wait between pictures taken. | 
| CAP_TIMEDATE | Date and Time the image was acquired. | 
| CAP_UICONTROLLABLE | Indicates that Source supports acquisitions with UI disabled. | 
| CAP_XFERCOUNT | Number of images the application is willing to accept this session. | 
| ICAP_AUTOBRIGHT | Enable Source’s Auto-brightness function. | 
| ICAP_AUTOMATICBORDERDETECTION | Turns automatic border detection on and off. | 
| ICAP_AUTOMATICDESKEW | Turns automatic skew detection on and off. | 
| ICAP_AUTOMATICROTATE | When TRUE, depends on source to automatically rotate the image. | 
| ICAP_BARCODEDETECTIONENABLED | Turns bar code detection on and off. | 
| ICAP_BARCODEMAXRETRIES | Restricts the number of times a search will be retried if no bar codes are found. | 
| ICAP_BARCODEMAXSEARCHPRIORITIES | Specifies the maximum number of supported search priorities. | 
| ICAP_BARCODESEARCHMODE | Restricts bar code searching to certain orientations, or prioritizes one orientation over another. Uses ImGearBarcodeSearchModes values. | 
| ICAP_BARCODESEARCHPRIORITIES | A prioritized list of bar code types dictating the order in which they will be sought. Uses ImGearBarcodeType values. | 
| ICAP_BARCODETIMEOUT | Restricts the total time spent on searching for bar codes on a page. | 
| ICAP_BITDEPTH | Pixel bit depth for Current value of ICAP_PIXELTYPE. | 
| ICAP_BITDEPTHREDUCTION | Allows a choice of the reduction method for bit depth loss. Uses ImGearBitDepthReduction values. | 
| ICAP_BITORDER | Specifies how the bytes in an image are filled by the Source. Uses ImGearBitOrder values. | 
| ICAP_BITORDERCODES | CCITT Compression. | 
| ICAP_BRIGHTNESS | Source brightness values. | 
| ICAP_CCITTKFACTOR | CCITT Compression. | 
| ICAP_COMPRESSION | Buffered Memory transfer compression schemes. | 
| ICAP_CONTRAST | Source contrast values. | 
| ICAP_CUSTHALFTONE | Square-cell halftone (dithering) matrix to be used. | 
| ICAP_EXPOSURETIME | Exposure time used to capture the image, in seconds. | 
| ICAP_EXTIMAGEINFO | Allows the application to query the data source to see if it supports the new operation
            triplet DG_IMAGE/DAT_EXTIMAGEINFO/MSG_GET. | 
| ICAP_FILTER | Color characteristics of the subtractive filter applied to the image data. Uses ImGearFilterType values. | 
| ICAP_FLASHUSED | Specifies whether or not the image was acquired using a flash. | 
| ICAP_FLASHUSED2 | For devices that support a flash, setting selects the flash to be used; getting reports the current setting. Uses ImGearFlashUsed values. | 
| ICAP_FLIPROTATION | Orients images that flip orientation every other image. Uses ImGearFlipRotation values. | 
| ICAP_FRAMES | Size and location of frames on page. | 
| ICAP_GAMMA | Gamma correction value for the image data. | 
| ICAP_HALFTONES | Source halftone patterns. | 
| ICAP_HIGHLIGHT | Lightest highlight, values lighter than this value will be set to this value. | 
| ICAP_IMAGEDATASET | Gets or sets the image indices that will be delivered during the standard image transfer. | 
| ICAP_IMAGEFILEFORMAT | File formats for file transfers. | 
| ICAP_IMAGEFILTER | For devices that support image filtering, selects the algorithm to be used. Uses ImGearImageFilter values. | 
| ICAP_JPEGPIXELTYPE | JPEG Compression. | 
| ICAP_JPEGQUALITY | JPEG quality. Uses ImGearJPEGQuality values, or values in the range 0 - 100. | 
| ICAP_LAMPSTATE | Whether the lamp is on. | 
| ICAP_LIGHTPATH | Image was captured transmissively or reflectively. Uses ImGearLightPath values. | 
| ICAP_LIGHTSOURCE | Describes the color characteristic of the light source used to acquire the image. Uses ImGearLightSource values. | 
| ICAP_MAXFRAMES | Maximum number of frames possible per page. | 
| ICAP_MINIMUMHEIGHT | Allows the source to define the minimum height (Y-axis) that the source can acquire. | 
| ICAP_MINIMUMWIDTH | Allows the source to define the minimum width (X-axis) that the source can acquire. | 
| ICAP_NOISEFILTER | For devices that support noise filtering, selects the algorithm to be used. Uses ImGearNoiseFilter values. | 
| ICAP_ORIENTATION | Defines which edge of the paper is the top: Portrait or Landscape. Uses ImGearOrientation values. | 
| ICAP_OVERSCAN | For devices that support overscanning, controls whether additional rows or columns are appended to the image. Uses ImGearOverscanModes values. | 
| ICAP_PATCHCODEDETECTIONENABLED | Turns patch code detection on and off. | 
| ICAP_PATCHCODEMAXRETRIES | Restricts the number of times a search will be retried if none are found on a page. | 
| ICAP_PATCHCODEMAXSEARCHPRIORITIES | Maximum number of search priorities. | 
| ICAP_PATCHCODESEARCHMODE | Restricts patch code searching to certain orientations, or prioritizes one orientation over another. | 
| ICAP_PATCHCODESEARCHPRIORITIES | List of patch code types dictating the order in which patch codes will be sought. Uses ImGearPatchCode values. | 
| ICAP_PATCHCODETIMEOUT | Restricts total time for searching for a patch code on a page. | 
| ICAP_PHYSICALHEIGHT | Maximum height Source can acquire (in ICAP_UNITS). | 
| ICAP_PHYSICALWIDTH | Maximum width Source can acquire (in ICAP_UNITS). | 
| ICAP_PIXELFLAVOR | Sense of the pixel whose numeric value is zero. Uses ImGearPixelFlavor values. | 
| ICAP_PIXELFLAVORCODES | CCITT Compression. | 
| ICAP_PIXELTYPE | The type of pixel data (B/W, gray, color, etc.). Uses ImGearPixelType values. | 
| ICAP_PLANARCHUNKY | Color data format - Planar or Chunky. Uses ImGearColorDataFormats values. | 
| ICAP_ROTATION | Source can, or should, rotate image this number of degrees. | 
| ICAP_SHADOW | Darkest shadow, values darker than this value will be set to this value. | 
| ICAP_SUPPORTEDBARCODETYPES | Provides a list of bar code types that can be detected by current data source. Uses ImGearBarcodeType values. | 
| ICAP_SUPPORTEDPATCHCODETYPES | List of patch code types that can be detected by current data source. Uses ImGearPatchCode values. | 
| ICAP_SUPPORTEDSIZES | This specifies the size(s) the Source can/should use to acquire image data. Uses ImGearSupportedSizes values. | 
| ICAP_THRESHOLD | Specifies the dividing line between black and white values. | 
| ICAP_TILES | Tiled image data. | 
| ICAP_TIMEFILL | CCITT Compression. | 
| ICAP_UNDEFINEDIMAGESIZE | The application will accept undefined image size. | 
| ICAP_UNITS | Unit of measure (inches, centimeters, etc.). Uses ImGearUnits values. | 
| ICAP_XFERMECH | Transfer mechanism - used to learn options and set-up for upcoming transfer. Uses ImGearXferType values. | 
| ICAP_XNATIVERESOLUTION | Native optical resolution of device for x-axis. | 
| ICAP_XRESOLUTION | Current/available optical resolutions for x-axis, in dots per inch (DPI). | 
| ICAP_XSCALING | Source Scaling value (1.0 = 100%) for x-axis. | 
| ICAP_YNATIVERESOLUTION | Native optical resolution of device for y-axis. | 
| ICAP_YRESOLUTION | Current/available optical resolutions for y-axis, in dots per inch (DPI). | 
| ICAP_YSCALING | Source Scaling value (1.0 = 100%) for y-axis. | 
| ICAP_ZOOMFACTOR | Gets all camera supported lens zooming range or sets the selected zoom value. |