BCDecode (Function)

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Managing errors
Decoding QRCode

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BCDecode (Function)

In french: CBDécode

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

Caution: The QR Code must cover a sufficient section of source image and it must be sufficiently contrasted and clear in order for the decoding to be performed.

Versions 17 and later

This function is now available for WEBDEV sites in Windows.

New in version 17

This function is now available for WEBDEV sites in Windows.

Example

Syntax

<Result> = BCDecode(<Image>)

<Result>: BarCode variable

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

<Image>: Character string (with or without quotes)

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

Managing errors

To find out whether the retrieval failed, use:

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

Decoding QRCode

The table below presents the correspondence between the ..TypeContent and ..Content properties of 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 bar code.

Component : wd250barc.dll