I'm a .NET developer; I need to open PDF files inside the user interface of my application. It's a standalone application (not a web application) running in Windows Vista; it's written in C# and uses WPF (Windows Presentation Foundation) technology for the UI. I'd like to use an ActiveX control (which could already reside in my pc). I have Adobe Reader 8.0, but I seem to understand that Adobe Acrobat is required (see one of the answers at Opening a pdf in .NET). Could anyone just confirm that Adobe Reader is not sufficient? This is, of course, the first point to clarify. If so: are there any free ActiveX controls that I could download? Thank you very much in advance for your help!