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.
This tutorial shows you how to get ready to create your first PDF application with C#, Visual Studio and the ActiveX edition of Foxit Quick PDF Library. C# can be used with the ActiveX and DLL editions of Foxit Quick PDF Library – instructions for setting up the ActiveX edition in Visual Studio can be found below. [...]
Sometimes when upgrading a Delphi project to a new version of Foxit Quick PDF Library you may encounter an error message like this: Unit QuickPDFxxxx was compiled with a different version… The most likely cause of this error is that you may have an older version of the Foxit Quick PDF library in your project file somewhere. [...]
When calling the FindFormFieldByTitle it can sometimes find two fields with the same name. For example, in a PDF form there might be a form field with the title “Name_Of_Campaign“. The PDF SDK will find that form field fine but it might also find another field called with a very similar name such as “Name_Of_Campaign.“. [...]
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PHP developers can use the ActiveX edition of Foxit Quick PDF Library to add PDF functionality to their PHP websites running on the Windows operating system. Here’s a quick guide on how to get up and running: The first thing you’ll need to do is register the ActiveX edition of Foxit Quick PDF Library. The sample [...]
One method is to render each page to an image file and then check each pixel for RGB values not equal to each other. If R=G=B for each pixel then it’s a grayscale image. This should allow you to determine if a PDF file is color or black and white. There isn’t a document wide [...]
Foxit Quick PDF Library Lite is an ActiveX and so does not require an Instance ID. The Instance ID is only required by the DLL edition of the commercial version of Foxit Quick PDF Library. In addition, you do not need to — indeed, you cannot — call the UnlockKey function when using Quick PDF Library Lite [...]
Several sample projects are provided with the download files for the Dylib edition of Foxit Quick PDF Library for Mac OS X. We recommend that you start your evaluation of Foxit Quick PDF Library on Mac using these sample projects as they provide a useful guide for how to initialise the library inside an Xcode project [...]
Foxit Quick PDF Library can render a PDF as an image so that you can place it in your .NET application. Sample code using C# is provided below. private void Form1_Load(object sender, EventArgs e) { // Remember to initialize the library and call the // UnlockKey function with your license key before // calling the following [...]
Foxit Quick PDF Library lets you add visual digital signatures to PDF files programmatically with a few simple lines of code.