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Delphi: Most Popular Articles

These articles are the most popular over the last month.
Virtual Key Codes
Symbolic constant names, hexadecimal values, and keyboard equivalents for the virtual key codes used by Windows.
A Simple Guide to Performing Clipboard...
The Windows Clipboard represents the container for any text or graphics that are cut, copied or pasted from or to an application. This article will show you how to use the TClipboard object to implement cut-copy-paste features in your Delphi application.
How to Execute and Run Applications and Files...
Executing and Running Applications and Files from Delphi Code.
Pos function
Delphi's Pos function returns an integer specifying the position of the first occurrence of one string within another.
A Beginner's Guide to Delphi Programming
A Beginner's Guide to Delphi Programming. Free online programming tutorial / course for beginner developers. Focus on Borland Delphi.
Understanding and Processing Keyboard events in...
Get familiar with the OnKeyDown, OnKeyUp, and onKeyPress Delphi event procedures to respond to various key actions or handle and process ASCII characters along with other special purpose keys.
Listening to the Clipboard: Clipboard Delphi...
Extending the clipboard's flexibility and functionality from Delphi. Taking control over the Clipboard with custom formats. Coding Delphi to receive clipboard change notifications.
How to Use and Configure ".INI" Files in Delphi
The .INI files have a text-based file format for representing application configuration data in a format which is easily editable by humans and readable by a simple automatic parser. Learn how to use Delphi's TIniFile to read and write INI configuration files.
How to Email Attachments Using Delphi
Send email messages with attachments using Indy and Delphi. Full source code to a simple
How to Use 'TDICTIONARY' to Create Hash Tables...
Introduced in Delphi 2009, the TDictionary class, defined in Generics.Collections unit, represents a generic hash table type collection of key-value pairs. In Delphi, the TDictionary is defined as a hash table. Hash tables represents a collection of key-and-value pairs that are organized based on the hash code of the key. Hash tables are optimized for lookups (speed). When a key-value pair is added to a hash table, the hash of the key is computed and stored along with the added pair.
Date/Time routines - Delphi Programming
Date/Time Delphi functions and procedures in RTL
Synchronizing Threads and GUI in Delphi...
Multi-threading in Delphi lets you create applications that include several simultaneous paths of execution. When several threads are running in the application a question arises: how to update your GUI (user interface) as a result of a thread execution. The question lies in the TThread class Synchronize method.
Everything You Need to Know to Decompile Delphi
Whispering about reverse engineering Delphi applications: 'I have a Delphi program's .exe, can I decompile it and get the source?'. Page 3.
Creating a link / url TLabel
Let us improve standard TLabel component, so that it acts like a link in a web page.
Exchanging Data over the Network using Delphi
Exchanging Data over the Network using Delphi. In this article we'll examine two Delphi components: TServerSocket and TClientSocket, both designed to let you read and write information over a TCP/IP connection - thus enabling you to write network-aware applications.
Sorting records in Delphi DBGrid by Clicking on...
Sorting records in Delphi DBGrid. How to sort records in Delphi DbGrid by clicking on the column title. Plus: how to change the appearance of the selected column title to reflect the sort order. Even more: how to change the cursor when moving over the DBGrid column titles.
How to Create Windows Service Applications in...
Windows Service applications take requests from client applications, process those requests, and return information to the client applications. They typically run in the background, without much user input. Services can be automatically started when the computer boots, can be paused and restarted, and do not show any user interface.
String Types in Delphi (Delphi For Beginners)
Understanding and managing string data types in Delphi's Object Pascal. Learn about differences between Short, Long, Wide and null-terminated strings.
How to Create and Use DLLs in Delphi
A Dynamic Link library, or DLL, is a collection of routines (small programs) that can be called by applications and by other DLLs. Using Delphi, we can write and use our own DLLs, and we can call functions in DLLs developed with other systems / by other developers. Find out how.
Understanding and Using Array Data
The concept of arrays in Delphi is simple: arrays allow us to refer to a series of variables by the same name and to use a number (an index) to tell them apart. Arrays have both upper and lower bounds, and the elements of the array are contiguous within those bounds.
Adjusting DBGrid column widths automatically
Adjusting Delphi's DBGrid column widths automatically. Here's a handy method to automatically fix the size of TDBGrid columns (at run-time) to fit the DBGrid width (remove the unfilled space at the right edge of the grid; and consequently remove the horizontal scroll bar) when the user resizes the container containing the grid.
Drop down list (DBLookupComboBox) inside a...
Drop down list (DBLookupComboBox) inside a DBGrid - part 2. Here's how to place a DBLookupComboBox into a DBGrid. Create visually more attractive user interfaces for editing lookup fields inside a DBGrid - place a DBLookupComboBox into a cell of a DBGrid.
A Beginner's Guide to Delphi Database Programming
Free online database programming course for beginner Delphi developers. Focus on ADO techniques.
Understanding and Using Pointers in Delphi
An introduction to pointer data type in Delphi. What are pointers, why, when and how to use them.
How to Create, Parse and Manipulate XML...
Everything you need to know about Delphi and the Extensible Markup Language. Find out about creating and parsing XML documents, look for parser components and more.
Introducing Borland Delphi - Page 1/3
A Beginner’s Guide to Delphi Programming: Chapter 1. What is Borland Delphi? Where to download a free version, how to install and configure it.
How to Read and Customize XML/RSS Files in Delphi
Learn how to read and manipulate XML documents with Delphi using the TXMLDocument component. Let's see how to extract the most current
A Guide to Using Drag and Drop Operations in...
Delphi makes it easy to program dragging and dropping into our applications. You can even drag and drop from one form to another.
Understanding Generic Types in Delphi
Generics, a powerful addition to Delphi, were introduced in Delphi 2009 as a new langage feature. Generics or generic types (also know as parametrized types), allow you to define classes that don't specifically define the type of certain data members. Get ready to use Generics.
Store a String (or an Object) Along with a...
There are situations when you want to display a list of strings to the user, for example in the list box control, but also have a way to store one more additional string (or event an object instance) along the one displayed to the user. Here's how when using Delphi.
How to Calculate MD5 Hashing for a File or...
The MD5 Message-Digest algorithm is used to check the integrity of files. Learn how to easily create a function to calculate the MD5 hash for a given file.
Accessing and managing MS Excel sheets with...
Accessing and managing MS Excel sheets with Delphi. How to retrieve, display and edit Microsoft Excel spreadsheets with ADO (dbGO) and Delphi. This step-by-step article describes how to connect to Excel, retrieve sheet data, and enable editing of data (using the DBGrid). You'll also find a list of most common errors (and how to deal with them) that might pop up in the process.
SQL in Delphi
Using Structured Query Language in Delphi.
A Quick Guide to Using the "TClientDataSet" in...
Looking for a single-file, single-user database for your next Delphi application? Need to store some application specific data but you do not want to user the Registry / INI / or something else?
Resource Files Made Easy (in Delphi applications)
How Delphi uses standard Windows-format resource files: icons, bitmaps and cursors.
Displaying and editing MEMO fiels in Delphi's...
Here's how to show the contents of a MEMO (textual BLOB) field in a TDBGrid. Plus: how to enable editing of a TMemoField's contents using a separate window.
TColorButton - button with color properties
TColorButton - button with color properties. Full source code of the TColorButton Delphi component, an extension to the standard TButton control, with font color, background color and mouse over color properties.
Network traffic monitor
A free network (Internet / intranet) traffic (download / upload) monitor. Network traffic monitor allows you to quickly and easily examine the network usage of the local computer. Full Delphi source code included.
Using 'TStopWatch' to View Process Execution...
The TStopWatch Delphi class implements a very accurate process execution timer and provides a set of methods and properties that you can use to accurately measure elapsed time.
Interfaces in Delphi Programming 101
If you are up to creating a rock solid (OOP driven) Delphi application in a way that your code is maintainable, reusable, and flexible the OOP nature of Delphi will help you drive the first 70% of your route. Defining interfaces and implementing them will help with the remaining 30%.
Coloring the TDBGrid Delphi component
Coloring DBGrid. How to enhance the functionality of a TDBgrid component using colors
Multithreaded Delphi Database Queries
To speed up data processing, for example, fetching data from the database to create reports, you can add an additional thread to fetch and operate on the result (recordset). Learn about the traps in writing Multithreaded Delphi Database Queries with dbGo (ADO).
Using the TDBGrid component
Contrary to most other Delphi data-aware controls, the DBGrid component has many nice features and is more powerful than you would have thought. The
DBGrid with MultiSelect
DBGrid with MultiSelect. Multiple row selection in Delphi DBGrid - providing the ability to select multiple records within the grid. A Beginner's Guide to Delphi Database Programming: Appendix A.
System Tray Delphi application - Quick and Easy
Placing Delphi applications in the System Tray in easy steps. The perfect place form programs that are left running for long periods of time with no user interaction.
Learning Object Oriented Programming with Delphi
Free online Borland Delphi OOP Course: Chapter Overview.
The Dark Side of Application.ProcessMessages in...
When programming an event handler in Delphi (like the OnClick event of a TButton), there comes the time when your application needs to be busy for a while, e.g. the code needs to write a big file or compress some data. If you do that you'll notice that your application seems to be locked. Your form cannot be moved anymore and the buttons are showing no sign of life. It seems to be crashed. Application.ProcessMessages might come as a rescue, but you need to know its dark side!
Static vs. Dynamic Dynamic Link Library Loading...
Before you can call routines defined in DLL, you must import them. Functions exported from a DLL can be imported in two ways: by declaring an external procedure or function (static), or by direct calls to DLL specific API functions (dynamic). What should be used when: static or dynamic loading of DLLs in Delphi.
PosEx function
Delphi's PosEx function returns an integer specifying the position of the first occurrence of one string within another, where the search starts at a specified position.
Understanding Creating, Using, and Closing...
Examining the life cycle of a Delphi Form - the central element of development in Delphi. See what's happening behind events OnCreate, OnActivate, OnShow, OnClose...
An Expert Guide to Using 'SET' Type Values in...
One of the Delphi language features not found in other modern languages is the notion of sets. Delphi's set type is a collection of values of the same ordinal type. Learn about Delphi sets to better understand Delphi source code.
How to Show a Login/Password Before the Main...
If you need to implement some kind of authorization for your Delphi application you might want to display a login / password dialog *before* the main form is created and displayed to the user. In short, the idea would be to create, display, and destroy the
Selecting and highlighting a row in a DBGrid -...
Need to highlight the row behind the mouse cursor in a DBGrid? Here's how to select (make active record) and highlight (change color, font, etc.) a row in a DBGrid as mouse moves around the grid.
What to Know about Using Record Data Types in...
Learn about records, Delphi's data structure that can mix any of Delphi's built in types including any types you have created.
Drop down list inside a DBGrid - part 1 (page...
Drop down list inside a DBGrid - part 1. Here's how to place a drop down pick list into a DBGrid. Create visually more attractive user interfaces for editing lookup fields inside a DBGrid - using the PickList property of a DBGrid column.
LeftStr function
Delphi's LeftStr function returns a string containing a specified number of characters from the left side of a string.
Understanding Method Overloading and Default...
Extending Delphi functions and procedures with default (optional) parameters and method overloading.
ExtractStrings function
Delphi's ExtractStrings function fills a string list with substrings parsed from a delimited list.
RightStr function
Delphi's RightStr function returns a string containing a specified number of characters from the right side of a string.
How to Share Data Between Apps in Delphi Using...
Learn how to send the WM_CopyData message between two Delphi applications to exchange information and make two applications communicate. The accompanying source code demonstrates how to send a string, record (complex data type) and even graphics to another application.
Owner vs. Parent in Delphi Applications
The differences between a Delphi component Owner and its Parent explained. Plus: when to use the Controls and Component properties of a Delphi component.
Copy function
Delphi's Copy function returns a substring of a string or a segment of a dynamic array.
Exchanging Data over the Network using Delphi -...
Exchanging Data over the Network using Delphi. An introduction to sending data over the network using Delphi and Indy. The article focuses on sending / receiving record data and raw (binary) data using TCP connections.
Streams, streams, ... TStream
Streams, streams, ... TStream. A stream is what its name suggests: a flowing river of data. A stream has a beginning, an end, and you're always somewhere in between of these two points. Learn about using the TStream class in Delphi: how to use stream objects to read from, write to, or copy information stored in a particular medium.
Constructing the Database Connection String...
When creating Delphi database applications that are to be run on various machines, the connection to the data source should not be hard-coded in the executable. This article (with the sample project) shows how to store database connection parameters (server and database name) in Registry and how to build the ConnectionString dynamically.
"Powered by Delphi" Logo Images
A collection of 'Powered by Delphi' logos. Place them on your Web site, your Delphi application splash-screen, about box, help, documentation, and anywhere else you think it might be appropriate.
Running Delphi Applications With Parameters
How to pass command-line parameters to your Delphi application and how to handle them.
QuotedStr function
Delphi's QuotedStr function returns the quoted version of a string.
Return Multiple Values From A Delphi Function
A Delphi function is a routine returning a value. A single value? Yes, No. No, a Delphi function can return multiple values and there are different ways how to achieve this goal. Either rely on VAR (by-reference) parameters or return a record, or something even more complex...
How to Embed Media Files into a Delphi...
Storing more that just code in the application executable file. Working with resources from Delphi. How to embed a WAV, AVI and an MP3 file in a Delphi executable.
Guide to Dynamic Component Creation (At...
Most often when programming in Delphi you don't need to dynamically create a component. If you drop a component on a form, Delphi handles the component creation automatically when the form is created. This article will cover the correct way to programmatically create components at run-time.
Adding components to a DBGrid
Adding components to a DBGrid. How to place just about any Delphi control (visual component) into a cell of a DGBrid. Find out how to put a CheckBox, a ComboBox (drop down list box), a DateTimePicker (calendar) and even an Image inside the DBGrid.
Understanding 'Sender' Parameters in Delphi...
Find out how to exploit the powers of the Sender parameter in Delphi: share event handlers and more.
How to Get Started with Delphi Programming
About.com's Delphi Programming site (http://delphi.about.com) proudly presents: free online programming tutorials for (beginner) Delphi developers!
Delphi History – from Pascal to Embarcader...
Concise descriptions of Delphi versions and its history, along with a brief list of features and notes. Find out how Delphi evolved from Pascal to a RAD tool that can help you deliver high-performance, scalable applications ranging from desktop and database solutions to mobile and distributed applications for the Internet – not only for Windows but also for Linux and the .NET.
IfThen function
Delphi's IfThen function returns one of two values, depending on the evaluation of an expression.
Multi-Resolution Delphi Applications
What to keep in mind when scaling Delphi applications (forms) on different screen resolutions.
Everything You Need to Know to Install and Use...
Screen RULER allows you to precisely measure anything on your computer screen. If you need to determine width and/or height of any object on your screen, Screen RULER is the tool to use. Transparency, units in pixels and millimeters and screen snapping are some of the features.
Implementing PING without using raw sockets
Implementing PING without using raw sockets. Implementing Internet pings using Delphi and the Icmp.dll.
Understanding Delphi Class (and Record) Helpers
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >A feature of the
Using 'Version Directives' to Write a Delphi...
Preparing to code with no barriers. See how to overcome the compiler version problem: compiling Delphi code for various Delphi versions.
How to Move and Resize Controls at Run Time (in...
While in most situations you will arrange all the controls on a Delphi form in a 'fixed' position, there are situations where you need to allow a user to change the placement and dimension of controls at run-time. Here's how to enable dragging and resizing controls with mouse, while the application is running.
How to Create a Splash Screen in a Delphi...
The most basic splash screen is just an image (more precisely a form with an image) that appears in the center of the desktop screen when the application is loading (and gets hidden when the application is ready for usage).
Virtual Tree View - How To Install - Delphi 3rd...
Any tree view like component's purpose is to display a hierarchical list of items. A most common one
Creating Custom Delphi Components, Part I -...
This first part demonstrates some of the best approaches to building components, and at the same time provides tips on deciding on the best base class to inherit from, using virtual declarations, the complexities of overriding, and so on.
Design Your Delphi Program in a Way That it...
When writing long running applications / processes (the kind of programs that will spend most of the day minimized to the task bar or system tray), it can become important not to let the program 'run away' with memory usage. Clean up memory used by your Delphi program using the SetProcessWorkingSetSize Windows API function. Learn how...
Sizing The ComboBox Drop Down Width - No Cut...
When a combo box is in dropped down state Windows draws a list box type of control to display combo box items for selection. When the length (of a string) of items exceeds the width of the combobox, the items are displayed as cut-off! Here's how to ensure all ComboBox items are visible when drop down list is displayed.
StringReplace function
Delphi's StringReplace function returns a string in which a specified substring has been replaced with another substring.
Customizing the DBNavigator
Customizing the DBNavigator. Enhancing the TDBNavigator component with modified graphics (glyphs), custom button captions, and more. Exposing the OnMouseUp/Down event for every button.
Using 'BPL' and 'DLL' in Delphi Application...
An overview of creating and using 'Borland Package Libraries' and how they compare with 'Dynamic Link Libraries' in creating smaller Delphi applications.
Understanding Delphi Project Files (.DPR)
Delphi organizes applications into what is called projects. A project is made up of the visual interface along with the code that activates the interface. Each project can have multiple forms, allowing us to build applications that have multiple windows. Find out about Delphi's Project File in this article!
Understanding and Using Loops in Delphi
Loops allow you to execute a sequence of statements repeatedly, using a control condition or variable to determine when the execution stops. Delphi has three kinds of control loop: repeat statements, while statements, and for statements. Learn how to use loops in Delphi programming.
Understanding ViewState and Postback Processing...
A Beginner's Guide to ASP.NET Programming for Delphi developers: Chapter 18. Find out what events (and in what order) are generated when ASP.NET receives a request for a Web Form. Learn about the ViewState - a technique ASP.NET uses to maintain page state changes across postbacks.
Exporting a TreeView to XML. Populating a...
Here's how to store TTreeView component items to XML (preserving the Text and other properties of a tree node) and how to populate a TreeView from an XML file.
Controlling the number of application instances...
Controlling the number of application instances. In this article you'll learn how to 'run-once enable' a Delphi application that can check for its previous (running) instance. Along the process, several techniques of implementing such a check will be discussed; as well as how to bring your already running application to the foreground, if a user tries to run it 'one more time'. By the end of the article you'll have a copy-to-go code to control the behavior of your application's multiple instances: with the option to limit the number of running instances.
Top 7 Free Delphi Component Sets
Looking for a free source multi-purpose Delphi component collection to add more power to your applications? Look no more, here's a list of the best Delphi component (free with source) sets on the Net!
An introduction to working with Windows Registry
Some basic facts and code samples on using Delphi and the Windows Registry database.
BoolToStr function
Delphi's BoolToStr function Returns a string from a boolean value.
MDI Development in Delphi. Part I.
Constructing 'multiple document interface' application with Delphi. Examining MDI parent/child relationship, menus and some most important MDI parent form properties.
Database Table to XML and Back - Using Delphi
Creating XML files from Paradox (or any DB) tables using Delphi. See how to export the data from a table to a XML file and how to import that data back to the table.
Delphi Tips, Tricks and Code Snippets
Delphi tips, tricks and code snippets. Looking for a small code sample to help you make something big? It's here!
Delphi ZIP / UNZIP (Compression) Components
A selected collection of open source, free, and commercial Delphi components to help you add ZIP / UNZIP functionality to your application. Compressing and deflating files and directories in well-known formats like ZIP, RAR, TAR, GZIP, CAB will not longer be a missing piece in your Delphi projects!
Delphi Thread Pool Example Using AsyncCalls
With AsyncCalls you can execute multiple Delphi functions at the same time and synchronize them at every point in the function or method that started them. Here's an example project taking advantage of the thread pool implementation with CancelAll and WaitAll.
What You Need to Know to Prevent Delphi App...
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" > Delphi's support
Using RTTI in Delphi
Delphi provided Runtime Type Information (RTTI) more than a decade ago. Yet even today many developers aren't fully aware of its risks and benefits. This article provides an overview of the RTTI usage in Delphi for Win32.
How to Dynamically Add Items (Holding Custom...
How to add menu items to a Menu (or Popup menu) at run-time, how to respond to the OnClick event. Plus: how to extend the TMenuItem to hold custom string property.
Create an Internet Shortcut (.URL) file using...
Unlike regular .LNK shortcuts (that point to a document or an application), Internet Shortcuts point to an URL (web document). Here's how to create an .URL file, Internet Shortcut, using Delphi.
Placing a TProgressBar into a TStatusBar
Placing a TProgressBar into a TStatusBar. Here's how to add a status bar (or any other Delphi component) to a progress bar. Provide visual feedback of application's lengthy operation in the status area of a Delphi form.
Implement a Button with a Drop Down (Popup) Menu
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >A "Button with
Storing Record Data in a BLOB Field
Here's how to store (and retrieve) a record (structure) value into a BLOB field in Delphi database applications.
Free Delphi components - with source
Free components, with code, made by the visitors of the About Delphi Programming community.
Threaded Delphi Tasks In A Thread Pool - OTL...
Having all your background threads running at the same time is not something Windows would be happy with. While Delphi does allow you to easily create a separate thread (by extending the TThread class) it does not provide a thread pool implementation out of the box. The OTL does - here's a sample thread pool for your background tasks implemented in OmniThreadLibrary.
ISAPI tutorial for Delphi developers - Page 1/15
A brief introduction to web-broker technology; Web Actions; The first ISAPI application; TWebRequestObject; TPageProducers; Database enabled applications, and more.
Chat application with Delphi source
Full Delphi source code to a simple Chat application. Learn how UDP (User Datagram Protocol) broadcast can be used to find partners with unknown IP addresses in the network.
Understanding Class Methods
Understanding and using Borland Delphi Class procedures / functions. What they are and how to find a practical use for them.
COM
The Component Object Model (COM) enables programmers to develop objects that can be accessed by any COM-compliant application. Both OLE and ActiveX are based on COM.
Proportionally Resize an Image - Creating...
Here's an idea for your next application: create a
Make The Enter Key Work Like Tab
Pressing the Tab key moves the input focus to next control and Shift-Tab to previous in the tab order of the form. When working with Windows applications, most users intuitively expect the Enter key to behave like a Tab key.
Anatomy of a Delphi Unit (Delphi For Beginners)
Delphi For Beginners: Interface, Implementation, Initialization, Finalization, Uses and other funny words.
TreeView with check boxes and radio buttons
TreeView with check boxes and radio buttons. Here's how to add check boxes and radio buttons to a TTreeView Delphi component. Give your applications a more professional and smoother look.
Understanding and Using Functions and Procedures
Have you ever found yourself writing the same code over and over to perform some common task within event handlers? Yes? It's time for you to learn about programs within a program. Let's call those mini programs subroutines.
Owner Drawing The String Grid
For StringGrids with simple content the default drawing action is sufficient, but when various aligns or different colors need to be included in the stringgrid, drawing code must be written in the OnDrawCell event to support owner draw. Owner draw does not need to be specifically set (as one has to with a TListBox), one just places drawing code in the event handler and it is called by the class code after drawing the grid.
Store More (Custom) Data Into The Tree Node Of...
The TTreeView Delphi component displays a hierarchical list of items - tree nodes. A node is presented by node text and an optional image. In real-world applications your tree nodes would need to carry more info: some more properties or even an entire custom object. How to?
CompareDate function
Delphi's CompareDate function compares two TDateTime values (returns 'less', 'equal' or 'greater'). Ignores the Time part if both values 'fall' on the same day.
How to Search for Files and Folders (matching a...
Stop. This is the one and only solution to file searching. Use Delphi to find any file in any directory and/or subdirectory that match a certain mask. Start searching.
Implementing QuickSort Sorting Algorithm in...
class="no-js" itemscope itemtype="http://schema.org/Article" > itemprop="description" >One of the common
A Simple example of Artificial Intelligence...
A Simple example of Artificial Intelligence using Delphi. The article explores Delphi approach to AI, using the pebble picking game. A simple game is used to show how computer can learn by correcting mistakes.
Intercepting Keyboard Input with Delphi -...
Intercepting keyboard input for controls that cannot receive the input focus. Working with keyboard hooks in Delphi.
Your First MDI Delphi Project
Learn how to create a powerful 'multiple document interface' application using Delphi. A Beginner's Guide to Delphi Programming: Chapter 11.
TryStrToInt function
Delphi's TryStrToInt function converts a string to an integer, returns False if string does not represent a valid number.
Power function
Delphi's Power function returns a real number raised any power.
How to Populate/Submit Forms Using 'TWebBrowser...
A web form or a form on a web page allows a web page visitor to enter data that is, in most cases, sent to the server for processing. When using the web browser (TWebBrowser) Delphi control you can programmatically fill in web form fields and submit the fom - using Delphi code. Here's how.
Your first MP3 Delphi player - part 1/4
See how to build a full-blown mp3 player with Delphi in just a few seconds. Even more: get the ID3 tag information from a mp3 file and change it!
Use Adobe Acrobat (PDF) Files in a Delphi...
Learn how to show an Adobe Acrobat (.PDF) file in a Delphi application, which requires the free Acrobat ActiveX control.
Advanced Mouse Processing
More sophisticated Mouse techniques. Is mouse Present? Handling OnMouseEnter, OnMouseLeave. Restrict movement, Set Position, Faking clicks, etc.
Debug vs. Release In Delphi Build Configurations
The Project Manager window in your Delphi (RAD Studio) IDE displays and organizes the contents of your current project group and any project it contains. The Build Configurations section will list various build configurations you have for your project. Since you can activate each of the build configurations you see in the Project Manager, then build your project producing a different executable file, the question is what is the difference between Debug and Release in Delphi?
Commenting Delphi code
Commenting Delphi code. Learn the art of helping yourself, when it comes to code maintenance. The purpose of adding comments to Delphi code is to provide more program readability using understandable description of what your code is doing.
DateTimePicker inside a DBGrid
DateTimePicker inside a DBGrid. Here's how to place a TDateTimePicker into a DBGrid. Create visually more attractive user interfaces for editing date/time fields inside a DBGrid - place a drop down calendar into a cell of a DBGrid.
Handling Errors and Exceptions
Unfortunately, building applications includes coding. Regardless of how carefully you write/debug your program, it will be impossible to imagine every situation that can go wrong. Learn how to handle errors and exceptions in Delphi applications.
Store User and Application Data in the Correct...
When in the need of storing some content related to your Delphi application on the user's hard disk, you should take care of the support for state separation of user data, user settings, and computer settings.
Ordinal and Enumerated Data Types (Delphi For...
Delphi For Beginners: Extend Delphi's built-in types by constructing your own types.
How to Use 'dbExpress' with Database Applicatio...
Overview of dbExpress, along with a collection of tutorials and articles on building database applications using this data access technology.
Delphi Record Helpers For Sets (And Other...
The Understanding Delphi Class (and Record) Helpers article introduces a feature of the Delphi language allowing you to extend the definition of a class or a record type by adding functions and procedures (methods) to existing classes and records without inheritance. In XE3 Delphi version, record helpers became more powerful by allowing to extend simple Delphi types like strings, integers, enums, sets and alike. Here's a sample helper for a set of bytes.
Open and Save - Creating Notepad
Working with common dialog boxes: Open and Save. How to create my own Notepad using Delphi. Part 1.
Drag a Delphi Form Without the Caption Bar
No title bar! How can we drag such a window? It's easy and fun: let's make a Delphi form move by clicking (and dragging) in it's client area.
Accessing protected members of a component
Accessing protected members of a component. Many Delphi components have useful properties and methods that are marked invisible ('protected') to a Delphi developer. In this article you will find the workaround to this problem - thus enabling you to access a DBGrid's RowHeights property, for example.
About Delphi Programming - for Novice...
What You Need to Know About Delphi Programming. The purpose of this page is to orient newcomers with an overview of some special features of the About Delphi Programming Web site.
GDI Graphics in Delphi - page 2/9
From simple lines to direct API calls: the ultimate tutorial to GDI graphics in Delphi. This tutorial will introduce you to some of the techniques in the GDI Delphi drawing. Look for: drawing lines and shapes, drawing pictures, flicker-free drawings, off-screen bitmaps, GDI drawings the API way...

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