Installation Guide

System Requirements

Delphi XE5 / C++Builder XE5 (RAD Studio XE5) to Delphi/C++Builder 13.1 Florence (RAD Studio 13.1)
Lazarus 1.0 or later (for Free Pascal)
Windows XP or later (Win32 / Win64)
Minimum 50 MB free disk space

Run the installer: Execute pdfium.exe as Administrator
Select IDE: Choose your development environment (Delphi/C++Builder/Lazarus)
Choose installation path: Select the directory where components will be installed
Complete installation: Follow the on-screen instructions
Verify installation: The following components will be added to the losLab palette:
- TPdf - Core PDF manipulation component
- TPdfView - PDF viewing and interaction component

If automatic installation fails, you can manually install the components:

When distributing applications that use PDFium VCL:

Include the matching DLLs\Win32\pdfium.dll or DLLs\Win64\pdfium.dll tree beside your application or in a parent application folder
For V8/XFA form support, include the matching DLLs\Win32\pdfium.v8.dll or DLLs\Win64\pdfium.v8.dll in the same DLLs tree and set EnableV8Engine before loading
No additional runtime licenses required
Royalty-free distribution for compiled applications

Components not visible: Ensure IDE was restarted after installation
Runtime errors: Verify the correct PDFium DLL is in DLLs\Win32 or DLLs\Win64, or directly in the application path
Access violations: Check that all required dependencies are installed and DLL architecture matches application (32-bit vs 64-bit)
Design-time errors: Rebuild packages and restart IDE
XFA forms not working: Ensure the matching pdfium.v8.dll is available in the platform DLLs folder and EnableV8Engine is set before loading

To remove PDFium VCL components: