Explore historical articles, tutorials, and technical guides for Foxit Quick PDF Library. Note: This product has been discontinued and integrated into our latest SDK tools.
Foxit Quick PDF Library does not support converting entire HTML documents to PDF, however, it is possible to use a limited set of HTML tags to draw content onto pages in PDF files using the HTML text functions such as DrawHTMLText. This article refers to a deprecated product. If you are looking for support for Foxit [...]
Adding links to PDF files is simple using the the AddLinkTo* functions available with Foxit Quick PDF Library.
Currently it is only possible to replace simple text that has not been encoded using Foxit Quick PDF Library using the scripting feature which uses Foxit Quick PDF Library behind the scenes. The function that lets you replace text is the ReplaceTag function. Basically, it is possible to replace some text in a PDF file [...]
There isn’t an easy way to check if a PDF contains compressed elements or not. There is not a PDF wide compression option, instead various different objects and streams in PDF files can be compressed individually, using different compression methods. So if you wanted to determine if a PDF contained any compression at all you [...]
When you use the SignFile function to add a digital signature to a PDF it adds an invisible digital signature which is not shown on any of the pages in the document. Instead the digital signature can be viewed by opening the PDF in Adobe Reader, Adobe Acrobat or another PDF editing application, and clicking [...]
The SignFile function in Foxit Quick PDF Library lets you sign PDF files using the PKCS#12 format (containing a certificate and private key). But sometimes more advanced signing options are required. This is why we’ve added two new functions: SetSignProcessPassthrough and GetSignProcessByteRange. These functions let you sign PDF files using signatures that were created externally. These [...]
Adding the certificate that was used to apply the digital signature into Adobe's list of Trusted Identities by some easy steps.
There are two main reasons Adobe Reader and Adobe Acrobat will prompt you to save changes to a file after opening it. The PDF was in some way corrupt and Adobe Reader / Adobe Acrobat automatically repaired it without showing you a warning message. As a result of the automatic repair, the Save button is [...]
As well as enabling you to generate form fields and fill form fields, Foxit Quick PDF Library makes it easy to extract form field data or information about form fields from PDF files. In the sample code below we demonstrate how to iterate through each page in a PDF to extract information about all of [...]
A form field must have an appearance stream associated with it in the PDF in order for the form field to be visible when the PDF is viewed or printed. Appearance streams control the appearance of widget annotations and allow them to be presented in visually different ways to reflect user interactions. When creating form [...]