' Public function to generate the matrix ' Returns a 2D integer array (0=White, 1=Black) Public Function GenerateQR(ByVal Data As String) As Variant Dim bitStream() As Integer Dim byteData() As Byte
For hobbyist or educational purposes, the class module provided above offers a transparent look into how QR codes are structured. For business-critical applications, utilizing a freely available ActiveX DLL that handles the low-level math is the safer and more robust path. vb6 qr code generator source code
Add a named Picture1 and a CommandButton named Command1 to your form. Set the ScaleMode of the PictureBox to 3 - Pixel . ' Public function to generate the matrix '
: Call QRCodegenBarcode("Your Text") to return a StdPicture object. Set the ScaleMode of the PictureBox to 3 - Pixel
QR scanners need a blank border around the graphic to detect the bounds of the matrix. The code above handles this automatically by adding an offset equal to twice the module size. 2. Exporting as an Image File
The ScaleSize variable dictating the pixel width of each matrix module directly affects image crispness. For small user interface displays, a scale of 2 or 3 is ideal. For scanning from printed physical paper, set the scale to 6 or higher to increase DPI print resolution. 2. Exporting to BMP or PNG