' Check if a QR code was read If result Is Nothing Then MsgBox "No QR code found" Else MsgBox "QR code text: " & result.Text End If End Sub

: If you use a DLL or OCX, remember you must include these in your installer and register them on the target machine. Which Method Should You Choose?

Private Function DecodeQRCode_CLI(imagePath As String) As String Dim cmd As String, tmp As String tmp = App.Path & "\qrdout.txt" cmd = "zbarimg -q --raw """ & imagePath & """ > """ & tmp & """" Shell cmd, vbHide ' Wait and read (simple) Dim fnum As Integer fnum = FreeFile On Error Resume Next Open tmp For Input As #fnum DecodeQRCode_CLI = "" If Err = 0 Then Line Input #fnum, DecodeQRCode_CLI Close #fnum End If Kill tmp End Function

Pseudo VB6 example (API varies by component):

Dim qrGenerator As Object Set qrGenerator = CreateObject("QRCodeLib.Generator")

If you cannot install DLLs on the target machine (e.g., locked-down industrial PC), call a free web API.

: A professional-grade DLL that supports VB6/VBA and can output GIF, SVG, or PDF files directly.

: Supports high error correction levels (up to Level 3/High) and specialized data like contact cards or URLs. : Uses a simple COM interface: Set barcode = CreateObject("Bytescout.BarCode.QRCode") Chilkat API / REST API Integration

He drops mdQRCodegen.bas into his project.

If you prefer a drag-and-drop experience, ActiveX controls are a solid choice. These controls often handle data binding, making them great for reports.

Simple conversion to BMP if LoadPicture fails:

What are you encoding (URLs, simple text, or structured industrial strings)?

A QR (Quick Response) code is a two-dimensional matrix barcode. Unlike a traditional barcode (linear), a QR code stores data both horizontally and vertically, holding up to 4,296 alphanumeric characters.

For applications that must run completely offline, relying on a third-party COM-visible ActiveX DLL or an OCX control is the most stable approach. Popular libraries include BarCodeWiz , StrokeScribe , or open-source .NET DLLs exposed to COM. 1. Register the DLL

Are you planning to display the QR code on a , or embed it inside a printed Crystal Report ?

To bridge this gap, we have three primary strategies: