I hope someone could help me. I tried to create a barcode image using Visual Studio and then want to convert this barcode images to PDF files.
When I preview this in VS, the barcode image exists, however when converted it to pdf, it disappeared. Did I do anything wrong? 
From website BarcodeLib, I just know how to save generated barcode into image files, like gif,png or bmp. But I still have no idea how to convert the image from VS to PDF. If you know the answer, hope you could share with me. Thank you!
Converting barcode image to pdf can be realized by some image processsing program, I know a image site which also offer the free online software to generate and convert barcode image, you can have a try just in case.
Just use some image and barcode processing program...