Function called by relation event after scanning a barcode.


PUBLIC FUNCTION dlgEvent__action_action_AfterBarcode( 
   dlg ui.DIALOG, errNo INTEGER, errMsg STRING, barcode STRING)

The action part of the function name is defined by the Action property of the relation (under Source UI Settings) . If the Action property is not set, an error will occur at compile time.

The function has four parameters:

  1. dlg. This is a ui.DIALOG object referencing the current dialog. The dialog can implement an INPUT, INPUT ARRAY, DISPLAY ARRAY, MENU, or CONSTRUCT. For more information, see The Dialog class in Genero Business Development Language User Guide.
  2. errNo. This is an SQLCA.SQLCODE error.
  3. errMsg. This is the SQLERRMESSAGE message.
  4. barcode. This is the barcode string.


When you select the After Barcode Scan property for the creation of the event, a function shell is created. Enter your code in the function.

This function is called when a barcode is scanned.

Example: After Barcode Scan

This example uses the After Barcode Scan code event on a relation. The Action property of the relation is set to scan. Every time a user scans a barcode, a message is displayed.

PUBLIC FUNCTION dlgEvent__action_scan_AfterBarcode(dlg ui.DIALOG, errNo INTEGER, errMsg STRING, barcode STRING)

        DISPLAY "Barcode scanned: " || barcode 
        DISPLAY "ERROR: [" || errNo || "] " || errMsg
    END IF