I am trying to make a QR code in crystal reports so I make code in windows form that makes the QR code then I have to pass the QR code to my crystal reports throw this form any idea, please
You can create a UFL that saves the resulting QR code as an image, so you can load it on the fly via the Graphic Location expression of a dummy image object on the report.
That's the approach I used when implementing this function.
This has the advantage of having no dependency on a QR Code font. If such a dependency doesn't bother you, there are several solutions using that approach. Here is one such solution.