Twain functions

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Retrieving documents coming from Twain devices

Twain functions

The following functions are used to manage the Twain devices:


TwainCurrentSource	Allows you to find out and change the Twain device used by default.
TwainListSource	Returns the list of drivers for the Twain devices connected to the current computer.
TwainProperty	Used to find out or modify the properties of the current Twain device.
TwainScanZone	Used to define or re-initialize the area to scan.
TwainSelectSource	Displays a standard dialog box used to list the different Twain devices available on the current computer.
TwainSourceHeight	Returns the height (in millimeters) of the document captured by a Twain device.
TwainSourceWidth	Returns the width (in millimeters) of the document captured by a Twain device.
TwainState	Returns the status of the current source.
TwainToBMP	Allows you to perform one of the following actions: save the document coming from the Twain device in a Bitmap file (".BMP" extension). view the document coming from the Twain device in the user interface of the device. save the document coming from the Twain device directly in memory in Bitmap format (in a buffer).
TwainToClipboard	Used to: copy the document coming from the Twain device into the clipboard. view the document coming from the Twain device in the user interface of device.
TwainToControl	Used to : view the document coming from the Twain device in an Image control. view the document coming from the Twain device in the user interface of device.
TwainToGIF	Allows: save the document coming from the Twain device in a GIF file. view the document coming from the Twain device in the user interface of device. save the document coming from the Twain device directly in memory in GIF format (in a buffer).
TwainToJPEG	Allows you to: save the document coming from the Twain device in a JPEG file. view the document coming from the Twain device in the user interface of device. save the document coming from the Twain device directly in memory in JPEG format (in a buffer).
TwainToPDF	Allows you to: save the document coming from the Twain device in a PDF file. view the document coming from the Twain device in the user interface of device. save the document coming from the Twain device directly in memory in PDF format (in a buffer).
TwainToTIFF	Allows you to: save the document coming from the Twain device in a TIFF file. view the document coming from the Twain device in the user interface of device. save the document coming from the Twain device directly in memory in TIFF format (in a buffer).

Related Examples:

Complete examples (WINDEV): WD Scanner - Twain

[ + ] This example presents the management of devices compatible with the TWAIN standard (scanner, WebCam, digital camera, and so on) of WINDEV.

Summary of the example supplied with WINDEV:
This example presents the use of the TWAINxxx functions via digitizing application. This example is used to:
- preview a section
- digitize a document (gif, jpeg or bmp format)
- digitize a document and copy it to the clipboard
- digitize a document and print it

Unit examples (WINDEV): TWAIN: digitizing

[ + ] Using a Twain device (scanner, digital camera, etc.):
- Select the device used
- Digitize a document in file format (BMP, GIF or JPEG)
- Digitize a document and display it in an Image control
- Digitize a document and store it in the clipboard

Sample components (WINDEV): WD Photocopier

[ + ] The Photocopier component enables you to photocopy documents via a scanner and a printer. The scanner must be Twain-compatible in order for the component to operate.
This component can be used in two modes:
- With an interface used to define some parameters such as the lightness or the number of copies.
- Without interface. The parameters of the computer will be used by default. You also have the ability to pass custom parameters