BCDecode (Function)

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Help / WLanguage / WLanguage functions / Standard functions / Windows functions / Bar Code functions

Handling errors
Android strikethrough decoding
Decoding QRCode

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BCDecode (Function)

In french: CBDécode

Decodes the information contained in a bar code. This bar code is contained in an image (image displayed in an Image control, file of an image or image in memory).

The type of bar code to be decoded depends on the execution platform:

Only QR Codes can be decoded.
All bar codes managed by the system can be decoded.

Attention The strikethrough code must cover a sufficiently large area of the source image, with sufficient contrast and sharpness for decoding.

Example

// Décodage d'un QR Code à partir d'un champ Caméra
s is Buffer
s = dSaveImageBMP(CAM_SansNom1, inMemory)
cb is BarCode 
cb = BCDecode(s)
IF ErrorOccurred = False _AND_ cb.TypeCodeBarres = BC_QRCODE 
		_AND_ cb.TypeContenu = bcTypeEmail THEN
    	Info("Adresse email : " + cb.Contenu)
END

Syntax

<Result> = BCDecode(<Image>)

<Result>: BarCode variable

BarCode variable initialized with the information read in the bar code.

<Image>: Character string

Image of bar code to decode. This parameter can correspond to:
the name of an Image control.
the buffer of an image returned by dSaveImageBMP, dSaveImageGIF, dSaveImageJPEG and dSaveImagePNG.
the name of an image file.

Remarks

Handling errors

To find out whether the retrieval failed, use:

the ErrorOccurred variable,
the TypeBarCode property of the BarCode variable. If this property differs from BC_QRCODE, the bar code was not detected or decoded.

Android strikethrough decoding

Up to version 2025barcode decoding uses the Zxing library (http://code.google.com/p/zxing).
If this library is not on the device, it will be automatically available for download.
Please note: This library requires that you use the device's landscape mode.
From version 2025 Update 1strikethrough decoding uses ML Kit's barcode reading API.

Decoding QRCode

The table below presents the relationship between the TypeContent and Content properties of the BarCode variable:

Type of content	Type of value (..Content)	Remark

bcTypeText	Character string	Example: "WINDEV is great!"
bcTypePhone	Character string	Exemple: "0612345678"
bcTypeSMS	Character string The members of the SMS structure (SMS.Message and SMS.Number) will be automatically filled with the values read in the bar code. The content will correspond to a string of the form: <Numéro> + RC + <Message>	Example: "0612345678<CR>Text to send"
bcTypeURL	Character string	Example: "http://www.google.com"
bcTypeMarket	Character string	Example: "market://search?q=pname:com.company.application"
bcTypeWiFi	Character string	Character string in the following format: <SSID> + TAB + <Security protocol>+ TAB + <Key> Example: "MyNetwork<TAB>WPA<TAB>pwd"
bcTypeEmail	Character string	Example: "name@email.com"
bcTypeContact	Empty. The members of the mContact structure will be automatically filled with the values read in the bar code.
bcTypeLocation	geoPosition variable. The Latitude and Longitude properties of the variable will be automatically filled with the values read in the barcode.

Component: wd300barc.dll