An excellent open-source choice is the VbQRCodegen library on GitHub . It is based on the highly-regarded Nayuki QR library and is distributed as a single .bas module.
You can use the Chilkat VB6 API Examples to send a GET request to an endpoint like api.qrserver.com and save the resulting PNG or display it in a PictureBox . 3. Commercial ActiveX / OCX Controls qr code in vb6
You simply add mdQRCodegen.bas to your project. You can then call the QRCodegenBarcode function, which returns a vector-based StdPicture object. This allows you to scale the QR code to any size without losing quality. Example Code: An excellent open-source choice is the VbQRCodegen library
If your application will always have internet access, using a REST API is the simplest method. This offloads the complex math of QR generation to a remote server. This allows you to scale the QR code