BCDecode (Function)

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Handling errors
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.

Caution: The bar code must cover a large section of the source image and be sharp and clearly defined for decoding.

Example

// Decode a QR Code from a Camera control
s is Buffer
s = dSaveImageBMP(CAM_NoName1, inMemory)
bc is BarCode
bc = BCDecode(s)
IF ErrorOccurred = False _AND_ bc.TypeBarCode = BC_QRCODE
_AND_ bc.TypeContent = bcTypeEmail THEN
Info("Email address: " + bc.Content)
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 dSaveImagePNG, dSaveImageGIF, dSaveImageJPEG and dSaveImageBMP.
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.

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	Example: "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 in the following format: <Number> + CR + <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