How Delphi!

Category: Delphi General

  • How can extract file information from file in Delphi?

    In Delphi, you can extract file information using the TFile and TFileInfo classes from the System.IOUtils unit. These classes provide convenient methods for working with files. Here’s an example of how to extract file information: unit FileInfoExtractor; interface uses System.SysUtils, System.Classes, System.IOUtils; type TFileInfoExtractor = class class procedure ExtractFileInfo(const FileName: string); end; implementation { TFileInfoExtractor…

  • How can load a DLL dynamically at runtime in Delphi?

    In Delphi, you can load a DLL dynamically at runtime using the LoadLibrary function from the Windows API. Here’s a simple example demonstrating how to load a DLL dynamically and call a function: unit MainUnit; interface uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs; type TForm1 = class(TForm) procedure FormCreate(Sender: TObject); procedure FormDestroy(Sender:…

  • How can I create and use DLL in Delphi?

    Creating and using DLLs (Dynamic Link Libraries) in Delphi involves defining functions or procedures in a separate unit or project, compiling it into a DLL, and then using it in another Delphi application. Here’s a step-by-step guide: Step 1: Create a DLL project Open the Delphi IDE. Create a new project: File -> New ->…

  • How can I communicate two thread in Delphi?

    In Delphi, you can use various synchronization mechanisms to allow communication between two threads. One common approach is to use a thread-safe queue or an event to pass messages between threads. Below is an example using a thread-safe queue to communicate between two threads. unit ThreadCommunication; interface uses Classes, SysUtils, Generics.Collections, Windows; type TMessageThread =…

  • How can I create thread based timer in Delphi?

    In Delphi, you can create a timer using a separate thread. One common approach is to use the TThread class and synchronize the timer events with the main thread. Here’s a simple example: unit ThreadTimer; interface uses Classes, SysUtils, Windows; type TTimerThread = class(TThread) private FInterval: Integer; FOnTimer: TNotifyEvent; protected procedure Execute; override; public constructor…

  • How can I get random byte in given number of points from file in Delphi?

    To get random bytes from a file at 23 different positions, you can use Delphi’s TFileStream in combination with the Random function. Here’s an example: unit Unit1; interface uses Windows, Classes, SysUtils; procedure ReadRandomBytes(const fileName: string; numPoints: Integer); implementation procedure ReadRandomBytes(const fileName: string; numPoints: Integer); var FileStream: TFileStream; FileSize: Int64; Position: Int64; Buffer: Byte; i:…

  • How can I use TOrientationSensor in Delphi?

    TOrientationSensor is a component in the FireMonkey library in Delphi that allows you to detect and respond to changes in device orientation. It is similar to the TMotionSensor component, but it is specifically designed for handling orientation changes. To use the TOrientationSensor component in Delphi, you will first need to add the FMX.Sensors unit to…

  • How can I use TMotionSensor in Delphi?

    TMotionSensor is a component in the FireMonkey library in Delphi that allows you to detect and respond to changes in device orientation and movement. To use it in your Delphi application, you will first need to add the FMX.Sensors unit to your uses clause. Then, you can drop a TMotionSensor component onto your form and…

  • How can I use TLocationSensor in Delphi?

    TLocationSensor is a built-in component in Delphi that allows you to access the location information of a device. The TLocationSensor component is part of the FireMonkey framework and is available starting with Delphi XE7. To use TLocationSensor in Delphi, you can follow these steps: Place a TLocationSensor component on your form, either from the component…

  • How can I use TDropTarget in Delphi?

    TDropTarget is a built-in component in Delphi that allows you to enable drag-and-drop functionality for your application. To use TDropTarget in Delphi, you can follow these steps: Place a TDropTarget component on your form, either from the component palette or by dragging it from the Tool Palette. Set the properties of the TDropTarget component, such…