Delphi HotPDF Component Hello World Sample
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Browse PDF, Delphi, and document software engineering notes from losLab
Fix the HotPDF component reuse issue
Discover how to solve the “Please load the document before using BeginDoc” error while usingHotPDF Delphi Componentand eliminate PDF file access conflicts through strategic state management and…
Building AcroForm Fields and Actions with HotPDF in Delphi
A claims team ships a Delphi-generated consent form that looks flawless in Acrobat: every checkbox renders, every caption aligns, the layout matches the paper original. Three weeks later the intake…
AES-256 PDF Encryption in Delphi: HotPDF Setup and Pitfalls
The support ticket read: "Statements open fine on our desktops, but the customer's records-management system flags every file as unreadable." The PDFs were encrypted with AES-256, exactly as the…
Comprehensive Guide to PDF Barcode Generation
In today’s digital world, barcodes serve as the backbone of inventory management, retail operations, and data tracking systems. The ability to generate professional PDF documents containing various…
HotPDF Canvas Draw
This HotPDF Component sample demonstrates how to create vector-style PDF drawings with the same TCanvas workflow Delphi developers already use in VCL applications. Instead of treating PDF output as a…
HotPDF Chart Sample
This HotPDF Component example exports a Delphi TeeChart chart into a PDF document. The sample demonstrates a practical bridge between interactive VCL charting and distributable PDF reports: users can…
Arabic and RTL Text Shaping in Delphi PDFs with HotPDF
Take the Arabic phraseيوضح ملف PDF, pass it toTextOut, and open the output: the letters run in the wrong direction and every one of them sits in its isolated form, disconnected from its neighbors. An…
HotPDF Component Delphi TextOut Sample Project
This comprehensiveHotPDF componentTextOut sample demonstrates advanced font handling, character set support, text scaling, spacing adjustments, and rendering modes. The sample generates detailed font…
HotPDF Component Vertical Text Sample Project
HotPDF Component Vertical Text Sample Project. HotPDF Delphi Component: Creating Vertical Text Layouts in PDF Documents This comprehensive guide
PDF Digital Signatures and PAdES in Delphi with HotPDF
Before a viewer shows the green tick on a signed PDF, it does three mechanical things: it reads the/ByteRangearray from the signature dictionary, hashes exactly the two byte spans that array…
Processing Large PDFs in Delphi: HotPDF Direct File API
The job was unremarkable: a nightly Delphi service that takes scanned mortgage archives, counts pages, and routes each file to the right processing queue. It ran silently for months — until a 1.4 GB…
The EndDoc Bug That Silently Disabled Font Subsetting
Generate a report, embed a TrueType font, and the output opens correctly in every viewer you try. The glyphs are right, the text is selectable, the file is valid. The only thing wrong is the size. A…
3D Colour LUTs in PDF With Type 0 Sampled Functions
PDF Functions are one of the quieter corners of the spec. Most developers meet them once, as the thing a Type 2 axial shading needs in order to fade between two colours, and never look again. That is…
Loading Hybrid-Reference PDFs From Word and Excel in Delphi
Open a PDF that Microsoft Word or Excel produced, page through it, and nothing looks unusual. Load it into a Delphi programme, read the page count back, and the number is right. Then re-save it with…
Add clickable hyperlinks to PDF files with HotPDF
This HotPDF sample shows how to place clickable hyperlinks in a generated PDF document. Hyperlinks are a small feature, but they matter in invoices, reports, product sheets, documentation exports,…
Object Streams and Incremental Updates in Delphi with HotPDF
Open any PDF that has lived through a few years of production use and you are likely to find more bookkeeping than content: thousands of small dictionary objects, each preceded by its ownobjheader,…
OpenType GSUB Stylistic Alternates in Pure Delphi
A designer picks a font with a single-storeyafor headings, or a slashed zero for tables, or a set of swash capitals for a cover. Those glyphs are in the font already. They are simply not the default.…
PDF/A, PDF/X, and PDF/UA Output in Delphi: HotPDF Guide
A government archive once bounced an entire deposit of 1,400 invoices generated by a customer's Delphi billing system. Every file opened perfectly in every viewer the customer tried; veraPDF rejected…
Hardening a Delphi PDF Signer Against Malicious PKCS#12
When you sign a PDF, you usually think of the signing key as something you control. It lives in a.pfxfile you generated, protected by a password you chose. The code that reads that file feels like…
Automating PDF Preflight Checks in Delphi with HotPDF
The monthly statement run looked correct on every developer's screen, so it shipped. The print bureau returned the whole batch two days later: RGB images in a CMYK job and no/Trappeddeclaration. The…
Delphi PDF Reports with HotPDF: TextOut, Fonts, Images
The first invoice almost every team renders with a PDF library comes out wrong in the same way: the header text sits along the bottom edge of the page, and each subsequent line climbs upward. Nothing…
HotPDF Table To PDF
This HotPDF Component sample converts database records into a paginated PDF table. It is a compact report-generation pattern: read rows from a dataset, draw the table header, print each row at a…
XFA to AcroForm Flattening in Delphi Using HotPDF
"Please wait... If this message is not eventually replaced by the proper contents of the document, your PDF viewer may not be able to display this type of document." If your document pipeline has…
Flattening XFA Rich-Text Hyperlinks to PDF Links in Delphi
XFA, the XML Forms Architecture, is deprecated. ISO 32000-1 carries it in §12.7 with the note that it is removed from PDF 2.0, and modern viewers are dropping their XFA engines one by one. None of…
Mastering PDF Annotations with HotPDF Delphi Component
PDF annotations are one of the most powerful features for creating interactive and collaborative documents. They allow users to add comments, highlights, stamps, and multimedia content directly to…
RtLTextOut Function in HotPDF Component
Right-to-Left (RTL) languages represent a significant portion of the world’s written communication systems, serving over 400 million people globally. These languages include Arabic, Hebrew, Persian…
Analysing PDF Font Properties with PDFium Component in Delphi
Understanding the fonts used in a PDF document is essential for quality control, accessibility compliance, and document forensics. TheFont Propertiesdemo shows how to access detailed font information…
Auditing PDF Security Risks With PDFium in Delphi
A PDF is not just paper. It is a container that can carry scripts that run when the file opens, links that start external programs, links that reach out to web servers, files nested inside files, and…
Building a Feature-Rich PDF Viewer with PDFium Component in Delphi
In this tutorial, we’ll explore how to create a professional PDF viewer application usingPDFium Component, a powerful Delphi component that wraps Google’s PDFium rendering engine. This demo showcases the…
Converting Images to PDF Documents with PDFium Component in Delphi
Converting images to PDF is a common requirement for document management, archiving, and sharing. TheImage to PDFdemo shows how to create multi-page PDF documents from a collection of images using…
Converting PDF Pages to JPEG Images with PDFium Component in Delphi
Converting PDF pages to images is essential for thumbnails, previews, and web display. ThePDF to JPGdemo shows how to render PDF pages as high-quality JPEG images using PDFium Component
Creating PDF Documents from Scratch with PDFium Component in Delphi
While PDFium is primarily known for PDF viewing and manipulation, PDFium Component also provides powerful PDF creation capabilities. TheCreate PDFdemo shows how to generate PDF documents programmatically…
Extracting Images from PDF Documents with PDFium Component in Delphi
PDF documents often contain valuable images—photographs, diagrams, charts, and graphics. TheExtract Imagesdemo shows how to extract all embedded images from a PDF document using PDFium Component, saving…
Extracting Text from PDF Documents with PDFium Component in Delphi
Text extraction is one of the most common PDF processing tasks. Whether you’re building a document search engine, data mining application, or content management system, the ability to extract text…
Hardening a PDFium Component Binding: ABI and Memory Safety
A Pascal binding over a C library reads like ordinary Pascal. You call a method, you get a record back, you free what you allocated. The trouble is that PDFium is a C and C++ library with its own…
Merging Multiple PDF Files into One Document with PDFium Component
Combining multiple PDF documents into a single file is a common requirement in document management workflows. TheMerge PDFdemo shows how to merge any number of PDF files into one using PDFium Component in…
N-up Imposition and Page Reordering With PDFium
Merge and split are the two page operations everyone reaches for first, and they cover a lot of ground. They do not cover everything. There is a separate family of work that rearranges pages rather…
Build an Accessible PDF Reader in Delphi with PDFium
Point NVDA at a freshly built Delphi PDF viewer and you typically get one of two outcomes: silence, or text spoken in whatever order the content stream happens to store it — page footer first, then…
Delphi PDF Annotation Review with PDFium Component
A reviewer opens the same contract in your Delphi viewer and in Adobe Acrobat. Acrobat's comment pane lists fourteen items; your review panel shows eleven. Nothing is wrong with your loop. The…
PDF Form Field Navigation in Delphi (PDFium Component)
The bug report comes with a screenshot: "Your tool filled the form, but every field in Acrobat is blank. When I click into a field, the value suddenly appears." The data is in the file — the…
PDF Viewer for Lazarus and Free Pascal with PDFium
The port looked finished on Friday. A Delphi PDF viewer, moved to Lazarus over two days: a handful of unit-name changes, a few{$IFDEF FPC}blocks, and the project compiled clean. Monday's test run…
Low-Vision PDF Colour Filters in Delphi with PDFium
The feature request read simply: 'White pages are painful to read — please add a dark mode.' The first implementation inverted every pixel of the rendered page, shipped in a week, and generated a…
Build a PDF Intake Review Workbench in Delphi with PDFium
An insurance claims pipeline I worked on lost half a day to a single inbound file. The 'signed contract' a broker uploaded was an owner-password-encrypted PDF wrapping an XFA form: the text extractor…
Batch PDF Preflight Reports in Delphi: PDFium Component CLI
A scanning bureau I consulted for ran a nightly job that stamped thousands of digitized records 'archive ready.' Six months in, an external auditor sampled the archive with veraPDF and found PDF/A…
PDFium Delphi Viewer: Render Cache and Smooth Zoom Tactics
The support ticket read: 'viewer freezes for two seconds every time I touch the zoom slider.' The document was a 600-page scanned title deed, the machine a 4K laptop, and the code did what most first…
Secure PDF Preview in Delphi Apps with PDFium Component
A service-desk team I supported previewed customer attachments in an embedded PDF pane. One crafted 'invoice' carried a link whose visible text saidhttps://portal.example.combut whose action pointed…
Word-by-Word TTS Highlighting in Delphi PDFium Viewers
The first demo of our read-aloud feature for a literacy app went fine for two paragraphs. Then the page hit a drop cap, the voice said 'Chapter' whilst the highlight sat on the previous line, and by…
Printing PDF Documents with PDFium Component in Delphi
Printing PDF documents with accurate rendering and proper scaling is a common requirement. ThePrint PDFdemo shows how to implement professional PDF printing with preview, page selection, and quality…
Reusable Page Stamps via Form XObjects With PDFium
Stamping a watermark or a logo onto every page of a document looks like a five-minute job until you open the result in a file-size inspector. The obvious approach is to walk the pages and, on each…
Splitting PDF Documents into Multiple Files with PDFium Delphi
Splitting a large PDF into smaller files is essential for document distribution, archiving, and processing. TheSplit PDFdemo shows how to split PDF documents using various methods with PDFium Component in…
Streaming Huge PDFs on Demand With PDFium in Delphi
A scanned archive can run to several gigabytes in a single PDF. A viewer that opens such a file usually wants to show one page, maybe the table of contents, maybe a page the user jumped to from a…
Using PDFium Component in Delphi for side-by-side comparison of PDF documents
Comparing multiple PDF documents side by side is essential for revision review, quality control, and document verification. TheSplit Viewdemo shows how to display two or three PDF documents…
Validating Compressed PDFs: Object and XRef Streams
You write a small validator. It opens a PDF, seeks to the end, findsstartxref, reads the offset, and expects to land on the keywordxrefwith a fixed-width cross-reference table beneath it. From that…
Working with PDF Attachments in Delphi using PDFium Component
PDF documents can contain embedded file attachments—a powerful feature for bundling related files like spreadsheets, images, or supporting documents. TheAttachmentdemo shows how to work with PDF…
Barcodes in PDF With Delphi: QR, PDF417, DataMatrix
A barcode on a shipping label or an invoice has one job, which is to be read by a scanner on the first pass. Whether it survives that pass is decided long before the package reaches the dock. It is…
PDF Library for Delphi Compliance and Signing Workbench in Delphi
The question that breaks weak signing pipelines is rarely cryptographic. An auditor asks: "your preflight report says this invoice batch is PDF/A compliant — was that verified before or after the…
PDF Library for Delphi DLL, ActiveX, dylib Bindings Beyond Delphi
The bug report read "works from C# on Windows, crashes from Python on macOS." The team had built their macOS binding by copying the Windows declaration file and swapping the binary name. Every symbol…
Audit PDF Encryption and Permissions in Delphi: PDF Library for Delphi
A document intake pipeline once quarantined an entire batch of legal filings as 'encrypted' even though every file opened in Adobe Acrobat without a password prompt. The probe had reduced security…
GeoPDF in Delphi: Geospatial Coordinates With PDF Library for Delphi
Most developers think of a PDF page as a sheet of paper with text and pictures on it. A georeferenced PDF is more than that. It carries enough information to take a point on the page, measured in…
Interactive PDF Forms in Delphi: Actions and JavaScript
A PDF form field on its own is just a box that holds a value. What makes a form behave like a small application is the action attached to it: a click that hides a section, pulls saved values back…
Merge and Split Gigabyte PDFs in Delphi with PDF Library for Delphi
The nightly job that assembled mortgage closing packets ran fine for two years, then started dying the week a scanning vendor moved to 600 DPI. Individual archive files crossed 1.8 GB, and the…
Multi-Engine PDF Rendering in Delphi: PDF Library for Delphi Guide
Every PDF rasterizer has a file that humiliates it. In one support case it was a utility-bill run where soft-masked logos came out as black rectangles — but only at the customer site, because their…
PDF Layers in Delphi: Optional Content Groups (OCG)
A surveyor opens a site plan and wants the contours hidden while the utilities stay on. A reviewer wants the redline annotations visible on screen and gone from the printout. A product sheet ships in…
PAdES Digital Signatures in Delphi with PDF Library for Delphi
Adobe Acrobat reported every signature in the batch as valid. The customer's eIDAS conformance checker rejected every one of them. The gap came down to a single name in the signature dictionary: the…
PDF/A and PDF/UA Preflight in Delphi with PDF Library for Delphi
The discovery came six years after deployment: thirty-eight thousand archived invoices declared PDF/A-1b in their XMP metadata, and a example run through veraPDF failed nearly all of them —…
PDF Library for Delphi Print Preview and Device-Context Output in Delphi
The ticket was three lines long: "Preview shows the form centred. The printed page is shifted up and left, and the border is clipped on two sides." Nothing was wrong with the rendering code. The…
Tagged PDF Structure Trees in Delphi with PDF Library for Delphi
Run a screen reader across a typical generated invoice and listen to what it finds: the grand total announced before the line items, the page footer interrupting a paragraph, the items table…
Delphi PDF Text, Image, and Font Extraction with PDF Library for Delphi
Feed forty thousand customer PDFs into a search indexer and the failures sort themselves into three piles: documents whose words glue together because spacing thresholds were ignored, documents whose…
Hardening a Pascal PDF Parser Against Malicious Files
A PDF is not a document you open. It is a small programme you run. Every embedded font is a stack-based interpreter waiting for charstrings, every image is a decoder fed width, height, and bit-depth…
Vector Graphics in PDF With Delphi: Paths and Gradients
Most Delphi code that touches PDF treats the format as a container for two things: runs of text and a few placed bitmaps. That view is correct as far as it goes, and it leaves the most capable part…
Writing BIFF8 PivotTables in Delphi: SXDB and SXLI
Almost every part of the legacy Excel binary format is a single record with a clean two-byte type and a two-byte length. A cell is aLABELSSTor aNUMBER. A merged region is aMERGEDCELLS. You can read…
HotXLS Charts and Images: Excel Drawings in Delphi
The support ticket said the chart was missing. A Delphi service generated a monthly .xls report, created a chart sheet for the revenue trend, and then tried to write a data caption onto that same…
Excel Comments and Hyperlinks in Delphi with HotXLS
A reconciliation workbook leaves the finance system every night with two kinds of metadata stitched into it: cell comments explaining why a figure was adjusted, and hyperlinks pointing reviewers at…
HotXLS Conditional Formatting and Rich Text in Delphi
The rule was there. Excel listed it under Manage Rules, the range was right, the formula was right — and not a single cell was highlighted. This is the most common first contact with programmatic…
Export Excel to CSV, TSV, and HTML in Delphi (HotXLS)
The downstream ERP rejected the nightly feed with a parse error in the totals column. The CSV looked correct in a text editor until row 42, where the amount field read=SUM(D2:D41)— the formula…
HotXLS Data Validation, AutoFilter and Tables in Delphi
A batch service applied an AutoFilter to drop rejected rows from an order workbook, then handed the file to a second stage that read it back and exported the 'filtered' data. Every rejected row came…
Exporting Delphi Datasets to Excel Reports with HotXLS
A finance user opens last night's order export, selects the Amount column, and Excel's status bar shows a count but no sum. Every value in the column is text. The export code calledAsStringon every…
Excel Date Serials in Delphi: 1900 vs 1904 and numFmt
Open a spreadsheet, click a cell that shows2026-06-19, and the formula bar still reads a date. Read the same cell from Delphi and you get the number46192. Both views are correct, because Excel never…
Defined Names and Cross-Sheet Formulas in Delphi (HotXLS)
The change request was one line: raise the tax rate from 8% to 8.5%. The workbook generator, however, had the old rate baked in as the literal0.08within fourteen formula strings assembled by Pascal…
Engineering Functions in Delphi: Base Conversion, Complex
The engineering family in Excel reads like the easiest corner of the function reference.DEC2BINturns a number into a binary string.HEX2DECturns it back.IMSUMadds two complex numbers. Each one looks…
HotXLS Formula Engine and Custom Functions in Delphi
A reporting service writesSUM(B2:B501)into a totals cell, saves the workbook, then exports the same sheet to CSV for a downstream importer. The .xlsx opens perfectly in Excel, totals and all — yet…
Large Excel Workbook Performance in Delphi with HotXLS
When a 300,000-row export blows through its memory budget, the row count typically gets the blame — and the row count is typically innocent. The expensive parts of a big workbook are the ones created…
HotXLS Merged Cells and Report Template Layout in Delphi
The bug report said the invoice title had vanished. The generator mergedA1:F1correctly, styled it correctly — and wrote the title into B1. In both XLS and XLSX, a merged range displays the content of…
Open and Save ODS Files in Delphi with HotXLS
A Delphi reporting back-end that has produced .xlsx files for years gets a new requirement: a public-sector customer's procurement rules mandate OpenDocument Spreadsheet output, and that customer's…
Why Excel Rejects Your Encrypted Workbook: ECB and RC4
You write a workbook, encrypt it with a password, hand the file to a colleague, and the colleague opens it in Excel. Excel asks for the password. The colleague types it, and Excel accepts it. So far…
Generate Excel Files in Delphi Without Office Automation
The pager goes off at 02:10. The nightly report job has stalled, and Task Manager on the server shows eleven EXCEL.EXE processes owned by the service account, each waiting on a dialogue box that no…
HotXLS: Sheet Protection, Page Setup, and Printing in Delphi
A support ticket arrives: "The timesheet workbook you generate is broken - our staff can't type into the hours column anymore." Only one detail changed in the last release: the generator started…
List Sheet Names Fast in Delphi with HotXLS GetSheetNames
An upload endpoint receives a 180 MB .xlsx from a customer, and the only question the intake code needs answered is whether the workbook contains a sheet named 'Mapping'. Fully opening that file…
Excel Statistical Functions in Delphi: NORM, CHISQ, BETA
Type=NORM.DIST(115,100,15,TRUE)into a cell and Excel returns 0.8413447 without ceremony. The call reads like a lookup. It is not. Behind that one number is the cumulative normal distribution, an…
HotXLS Streaming Writes for Delphi Server Batch Jobs
Profile a Delphi service whilst it saves a 400,000-row workbook and the surprise is rarely the cell-filling loop - it is theSaveAscall. With the default writer, each worksheet is serialised into one…
Template-based Excel report generation in Delphi with HotXLS
A billing service I helped debug filled its invoice template by writing to fixed coordinates: customer name into B3, invoice date into E3, first detail line into row 10. One afternoon an accountant…
Unicode-Safe Spreadsheet Export in Delphi: RTF and HTML
A spreadsheet holds a column of customer names. Some are in Chinese, some in Cyrillic, a few carry German umlauts or a French accent. You export it to CSV and open the result, and every character is…
HotXLS: Preserve VBA Macros and External Links in Delphi
'After your service updates the monthly workbook, our macros are gone.' That support ticket typically has nothing to do with macro code at all. Somewhere in the pipeline a macro-enabled workbook was…
HotXLS: Workbook Audit and Format Conversion in Delphi
A document migration hands you forty thousand spreadsheet files accumulated since 2003: BIFF-era.xls, modern.xlsx, a scattering of.odsfrom a LibreOffice pilot, a few files nobody can open because the…
Setting Excel Document Properties in Delphi with HotXLS
Right-click any workbook your application ships, open Properties, and read the Details tab. If the Title says 'Q1 template — DO NOT USE' and the Author is an analyst who left the company in 2019,…
Encrypt XLSX Files with AES in Delphi using HotXLS
Try this experiment on any 'password-protected' workbook produced by your application: rename the.xlsxto.zip, open it in any archive tool, and look atxl/worksheets/sheet1.xml. If the cell values are…
Building a Simple PDF Document from Scratch
Building a Simple PDF Document from Scratch. Building a PDF Document using Notepad Master the art of creating PDF files manually and understand the
Debugging PDF Page Order Issues: A Real Case Study
Debugging PDF Page Order Issues: A Real Case Study. Debugging PDF Page Order Issues: HotPDF Component Real Case Study Published by losLab | PDF Development
Decoding Non-Standard PDF Structures – PDF without Pages dictionary
PDF files are everywhere in our digital world, but not all PDFs are created equal. While most PDF processing libraries assume a standard document structure, real-world PDFs often deviate from the…
In-depth exploration of PDF document structure
Welcome to the fascinating world of PDF internals!Have you ever wondered what makes a PDF file tick? Beyond the familiar documents we view daily lies a sophisticated architecture that has…
Master PDF Structure: XML Metadata, Bookmarks & Annotations
Master PDF Structure: XML Metadata, Bookmarks & Annotations. Understanding PDF XML Metadata and Bookmarks: A Technical Guide Key Topics Covered 📍
PDF Fast Web View Optimisation: Explanation & Tips of PDF Linearization
PDF Fast Web View Optimisation: Explanation & Tips of PDF Linearization. PDF Fast Web View: Linearization Optimisation Guides Have you ever encountered
PDF Graphics Explained: Understanding PDF Visual Elements
Discover the fascinating world of PDF graphics – from basic shapes to complex visual effects. This comprehensive guide reveals how PDFs create stunning visuals through elegant code structures
PDF Text and Font Handling with Code Examples and Best Practices
PDF documents have revolutionized how we share and preserve formatted text across different platforms and devices. But beneath the polished surface of every PDF lies a sophisticated text rendering…
Understanding PDF File Structure: A Technical Overview
The Portable Document Format (PDF) has become the de facto standard for document exchange and archival. Understanding its internal structure is essential for developers, system administrators, and…
Understanding PDF Page Ordering – Why Your PDF Pages Aren’t There
PDF documents are far more sophisticated than they appear to end users. While viewers see pages in a logical, sequential order (1, 2, 3…), the internal architecture of a PDF file tells a dramatically…
Understanding PDF Page Trees: Why Page Order Matters
PDF documents might look simple on the surface, but their internal structure can be surprisingly complex. One area that often trips up developers is understanding how PDF page ordering actually…
Understanding PDF: The Universal Document Format
Every day, millions of people open PDF files without giving it a second thought. But this ubiquitous format revolutionized how we share documents, ensuring that what you see on your screen matches…
Alcinoe with Delphi 11.1 Alexandria supporting
Alcinoe with Delphi 11.1 Alexandria supporting. Alcinoe Component Library by Zeus64 is an open source of visual and non-visual components library for
Cross-Compiling Delphi Components for C++Builder: Avoiding Unresolved Externals
When maintaining a VCL component written in Delphi but consumed by both Delphi and C++Builder users, you quickly realize that the two build systems treat dependencies very differently. A unit that…
Debugging Range Check Errors in Delphi PDF Libraries
When working withPDF manipulation libraries in Delphi, range check errors can be particularly frustrating because they often occur deep within complex document structures. These errors are especially…
Set TDateTimePicker format in Delphi 5
While adding Delphi 5 compatibility to an older VCL sample, the project failed on a line that is perfectly normal in newer Delphi versions. The code tried to assign a custom date pattern directly to…
Fix Delphi E2010 tagLOGBRUSH and tagLOGBRUSH32 incompatible types
Delphi XE2 and later moved a large part of the Windows API declarations into the scopedWinapi.Windowsunit and tightened several record declarations. Code that compiled in older Delphi versions can…
Create and Free a HotPDF Component Dynamically in C++Builder
Most HotPDF examples place a component on a form at design time. That is convenient for demos, but production code sometimes needs to create the PDF component only for a specific export operation.…
Extracting Document Summary Information from Excel Files in Delphi
When processing large batches of Excel spreadsheets in an automated pipeline, you rarely want to load the entire document into memory just to figure out what it is. Often, the metadata embedded…
Port Delphi _ftol inline assembly to 64-bit builds
Older Delphi code sometimes included a small_ftolhelper to convert a floating-point value to an integer. In 32-bit projects it was common to write this kind of helper with inline assembler,…
PDF electronic signature workflow with DigiSigner
Electronic signature tools are useful when a PDF needs approval without printing, scanning, and emailing copies back and forth. A signing service such as DigiSigner can handle simple document signing…
Automated PDF Preflight and Risk Auditing with PDFium
In enterprise printing, archiving, and document compliance workflows, a PDF file cannot simply be "rendered." It must be audited. A PDF might contain unflattened transparency groups that crash legacy…
Building Accessible PDF Viewers with Text-to-Speech in Delphi
Accessibility is no longer an optional feature in modern software development. Under regulations like the ADA (Americans with Disabilities Act) and the EU Web Accessibility Directive, software that…
Creating a Multi-Page PDF Viewer with Continuous Scrolling in Delphi
This tutorial explores theMulti-Page Viewerdemo, which extends the basic PDF viewer with continuous scrolling capabilities. This viewing mode is similar to how modern PDF readers like Adobe Acrobat…
Handling Hybrid-Reference PDFs from Office Applications in Delphi
When developing enterprise document solutions, you will inevitably encounter PDFs generated by a massive variety of tools, from high-end Adobe software to buggy open-source libraries or virtual…
High-Speed AES-256 PDF Encryption for Massive Documents
In legal, financial, and healthcare sectors, generating large volumes of PDF documents is standard practice. However, producing the documents is only half the battle; securing them is equally…
losLab PDF Library: A Comprehensive Feature Guide
losLab PDF Library is a robust PDF Software Development Kit (SDK)that provides an extensive range of functionalities for handling PDF files. This guide will explore the myriad features offered by our…
Memory-Safe PDF Parsing: Defending Against Malicious Documents
PDF documents are incredibly powerful, but that power comes with inherent security risks. Because PDFs support embedded files, interactive JavaScript, and complex binary streams, they are frequently…
Optimising IO Performance for Gigabyte-Scale PDF Processing
Processing standard PDFs (1MB to 10MB) in Delphi is straightforward using standard stream classes likeTFileStreamorTMemoryStream. However, when you are tasked with processing gigabyte-scale PDFs,…
Optimising PDF Processing Performance: From Minutes to Seconds
PDF processing performance can make or break a document handling application. What should be a simple page extraction operation can sometimes take several minutes to complete, frustrating users and…
Scaling PDF Pages by 70% using losLab PDF Library, in Delphi, C# & VB.Net
When working with PDFs, there are often requirements to scale the content for various purposes. In this scenario, we aim to reduce the size of all pages within a PDF by 70%. This guide walks through…
Transforming RTF Files into PDF: A Guide for Developers
In the world of document processing, converting Rich Text Format (RTF) files to Portable Document Format (PDF) is a common task. This conversion ensures the document’s layout remains consistent…