Desktop elements of windows

Содержание
  1. Windows Desktop Elements
  2. Start Menu Options
  3. Recycle Bin
  4. About Windows
  5. Desktop Window
  6. Application Windows
  7. Client Area
  8. Nonclient Area
  9. Controls and Dialog Boxes
  10. Window Attributes
  11. Class Name
  12. Window Name
  13. Window Style
  14. Extended Window Style
  15. Position
  16. Parent or Owner Window Handle
  17. Menu Handle or Child-Window Identifier
  18. Application Instance Handle
  19. Creation Data
  20. Window Handle
  21. Window Creation
  22. Main Window Creation
  23. Window-Creation Messages
  24. Multithread Applications
  25. Пошаговое руководство. создание традиционного классического приложения Windows (C++) Walkthrough: Create a traditional Windows Desktop application (C++)
  26. Предварительные требования Prerequisites
  27. Создание проекта для настольных систем Windows Create a Windows desktop project
  28. Создание проекта для классических приложений Windows в Visual Studio 2019 To create a Windows desktop project in Visual Studio 2019
  29. Создание проекта для классических приложений Windows в Visual Studio 2017 To create a Windows desktop project in Visual Studio 2017
  30. Создание проекта для классических приложений Windows в Visual Studio 2015 To create a Windows desktop project in Visual Studio 2015
  31. Создание кода Create the code
  32. Запуск классического приложения Windows To start a Windows desktop application
  33. Добавление функциональных возможностей в функцию WinMain To add functionality to the WinMain function
  34. Добавление функциональных возможностей в функцию WndProc To add functionality to the WndProc function
  35. Сборка кода Build the code
  36. Сборка примера To build this example

Windows Desktop Elements

Once you are logged in a window computer system, you will get dozens of applications, so you can choose an option of your requirement.

Many of the options have shortcut icon readily available on your computer screen; however, in some computers, you may not find any such option on the screen; in such a case, you can take the help of menu button (as shown in the image given below) −

As you can see in the above image, in the left bottom, there is a window symbol (i.e., menu button); once you click on it, the given menu option will appear and from here you can choose your option.

Start Menu Options

The following table lists down the options that appear after clicking on the Start menu −

It displays all those programs, which are installed in your system.

It displays a list of folders used by the user.

It displays the recently used file.

It displays a list of pictures.

It displays a list of music/song, etc.

It displays the drives of computer where user keeps his/her work, file, folder, song, video, picture, e-book, etc.

It displays all the installed computer programs (software).

It displays the installed printers (if printer is installed in the system, user can take print easily).

It helps users to know how to do a particular task.

It helps a user to find a file in computer.

It helps to start an application program or execute a DOS command.

It has different options that help to manage different settings of the computer, software as well as hardware.

It helps a user to log off the currently logged in user of the system.

It makes the system non-functional; however, puts the ongoing work and settings in memory and also keeps drawing small amount of power.

Hibernation puts the open documents and programs on hard disk and then turns off your computer; in comparison to ‘sleep’, it uses very low power.

Its function is to shut down and again start (log on) computer; it is done normally to refresh computer especially when computer is hanged.

It simply shuts down the system.

Note − Depending on the version of your window, the menu option may vary in terms of appearance and number of menu options; however, there would not be any change in basics.

Recycle Bin

Recycle Bin is a trash location where deleted files remain stored. Once you delete any sort of file, it gets stored (automatically) into recycle bin; therefore, if you mistakenly deleted some important file, don’t panic, go to recycle bin and restore it. However, if you deleted file from recycle bin as well, then it is very difficult to restore that permanently deleted file.

Источник

About Windows

This topic describes the programming elements that applications use to create and use windows; manage relationships between windows; and size, move, and display windows.

The overview includes the following topics.

Desktop Window

When you start the system, it automatically creates the desktop window. The desktop window is a system-defined window that paints the background of the screen and serves as the base for all windows displayed by all applications.

The GetDesktopWindow function returns a handle to the desktop window.

A system configuration application, such as a Control Panel item, changes the desktop wallpaper by using the SystemParametersInfo function with the wAction parameter set to SPI_SETDESKWALLPAPER and the lpvParam parameter specifying a bitmap file name. SystemParametersInfo then loads the bitmap from the specified file, uses the bitmap to paint the background of the screen, and enters the new file name in the registry.

Application Windows

Every graphical Windows-based application creates at least one window, called the main window, that serves as the primary interface between the user and the application. Most applications also create other windows, either directly or indirectly, to perform tasks related to the main window. Each window plays a part in displaying output and receiving input from the user.

When you start an application, the system also associates a taskbar button with the application. The taskbar button contains the program icon and title. When the application is active, its taskbar button is displayed in the pushed state.

An application window includes elements such as a title bar, a menu bar, the window menu (formerly known as the system menu), the minimize button, the maximize button, the restore button, the close button, a sizing border, a client area, a horizontal scroll bar, and a vertical scroll bar. An application’s main window typically includes all of these components. The following illustration shows these components in a typical main window.

Client Area

The client area is the part of a window where the application displays output, such as text or graphics. For example, a desktop publishing application displays the current page of a document in the client area. The application must provide a function, called a window procedure, to process input to the window and display output in the client area. For more information, see Window Procedures.

Nonclient Area

The title bar, menu bar, window menu, minimize and maximize buttons, sizing border, and scroll bars are referred to collectively as the window’s nonclient area. The system manages most aspects of the nonclient area; the application manages the appearance and behavior of its client area.

The title bar displays an application-defined icon and line of text; typically, the text specifies the name of the application or indicates the purpose of the window. An application specifies the icon and text when creating the window. The title bar also makes it possible for the user to move the window by using a mouse or other pointing device.

Most applications include a menu bar that lists the commands supported by the application. Items in the menu bar represent the main categories of commands. Clicking an item on the menu bar typically opens a pop-up menu whose items correspond to the tasks within a given category. By clicking a command, the user directs the application to carry out a task.

The window menu is created and managed by the system. It contains a standard set of menu items that, when chosen by the user, set a window’s size or position, close the application, or perform tasks. For more information, see Menus.

The buttons in the upper-right corner affect the size and position of the window. When you click the maximize button, the system enlarges the window to the size of the screen and positions the window, so it covers the entire desktop, minus the taskbar. At the same time, the system replaces the maximize button with the restore button. When you click the restore button, the system restores the window to its previous size and position. When you click the minimize button, the system reduces the window to the size of its taskbar button, positions the window over the taskbar button, and displays the taskbar button in its normal state. To restore the application to its previous size and position, click its taskbar button. When you click the close button, the application exits.

The sizing border is an area around the perimeter of the window that enables the user to size the window by using a mouse or other pointing device.

The horizontal scroll bar and vertical scroll bar convert mouse or keyboard input into values that an application uses to shift the contents of the client area either horizontally or vertically. For example, a word-processing application that displays a lengthy document typically provides a vertical scroll bar to enable the user to page up and down through the document.

Controls and Dialog Boxes

An application can create several types of windows in addition to its main window, including controls and dialog boxes.

A control is a window that an application uses to obtain a specific piece of information from the user, such as the name of a file to open or the desired point size of a text selection. Applications also use controls to obtain information needed to control a particular feature of an application. For example, a word-processing application typically provides a control to let the user turn word wrapping on and off. For more information, see Windows Controls.

Controls are always used in conjunction with another window—typically, a dialog box. A dialog box is a window that contains one or more controls. An application uses a dialog box to prompt the user for input needed to complete a command. For example, an application that includes a command to open a file would display a dialog box that includes controls in which the user specifies a path and file name. Dialog boxes do not typically use the same set of window components as does a main window. Most have a title bar, a window menu, a border (non-sizing), and a client area, but they typically do not have a menu bar, minimize and maximize buttons, or scroll bars. For more information, see Dialog Boxes.

A message box is a special dialog box that displays a note, caution, or warning to the user. For example, a message box can inform the user of a problem the application has encountered while performing a task. For more information, see Message Boxes.

Window Attributes

An application must provide the following information when creating a window. (With the exception of the Window Handle, which the creation function returns to uniquely identify the new window.)

These window attributes are described in the following sections.

Class Name

Every window belongs to a window class. An application must register a window class before creating any windows of that class. The window class defines most aspects of a window’s appearance and behavior. The chief component of a window class is the window procedure, a function that receives and processes all input and requests sent to the window. The system provides the input and requests in the form of messages. For more information, see Window Classes, Window Procedures, and Messages and Message Queues.

Window Name

A window name is a text string that identifies a window for the user. A main window, dialog box, or message box typically displays its window name in its title bar, if present. A control may display its window name, depending on the control’s class. For example, buttons, edit controls, and static controls displays their window names within the rectangle occupied by the control. However, controls such as list boxes and combo boxes do not display their window names.

Window Style

Every window has one or more window styles. A window style is a named constant that defines an aspect of the window’s appearance and behavior that is not specified by the window’s class. An application usually sets window styles when creating windows. It can also set the styles after creating a window by using the SetWindowLong function.

The system and, to some extent, the window procedure for the class, interpret the window styles.

Some window styles apply to all windows, but most apply to windows of specific window classes. The general window styles are represented by constants that begin with the WS_ prefix; they can be combined with the OR operator to form different types of windows, including main windows, dialog boxes, and child windows. The class-specific window styles define the appearance and behavior of windows belonging to the predefined control classes. For example, the SCROLLBAR class specifies a scroll bar control, but the SBS_HORZ and SBS_VERT styles determine whether a horizontal or vertical scroll bar control is created.

For lists of styles that can be used by windows, see the following topics:

Extended Window Style

Every window can optionally have one or more extended window styles. An extended window style is a named constant that defines an aspect of the window’s appearance and behavior that is not specified by the window class or the other window styles. An application usually sets extended window styles when creating windows. It can also set the styles after creating a window by using the SetWindowLong function.

Position

A window’s position is defined as the coordinates of its upper left corner. These coordinates, sometimes called window coordinates, are always relative to the upper left corner of the screen or, for a child window, the upper left corner of the parent window’s client area. For example, a top-level window having the coordinates (10,10) is placed 10 pixels to the right of the upper left corner of the screen and 10 pixels down from it. A child window having the coordinates (10,10) is placed 10 pixels to the right of the upper left corner of its parent window’s client area and 10 pixels down from it.

The WindowFromPoint function retrieves a handle to the window occupying a particular point on the screen. Similarly, the ChildWindowFromPoint and ChildWindowFromPointEx functions retrieve a handle to the child window occupying a particular point in the parent window’s client area. Although ChildWindowFromPointEx can ignore invisible, disabled, and transparent child windows, ChildWindowFromPoint cannot.

A window’s size (width and height) is given in pixels. A window can have zero width or height. If an application sets a window’s width and height to zero, the system sets the size to the default minimum window size. To discover the default minimum window size, an application uses the GetSystemMetrics function with the SM_CXMIN and SM_CYMIN flags.

An application may need to create a window with a client area of a particular size. The AdjustWindowRect and AdjustWindowRectEx functions calculate the required size of a window based on the desired size of the client area. The application can pass the resulting size values to the CreateWindowEx function.

An application can size a window so that it is extremely large; however, it should not size a window so that it is larger than the screen. Before setting a window’s size, the application should check the width and height of the screen by using GetSystemMetrics with the SM_CXSCREEN and SM_CYSCREEN flags.

Parent or Owner Window Handle

A window can have a parent window. A window that has a parent is called a child window. The parent window provides the coordinate system used for positioning a child window. Having a parent window affects aspects of a window’s appearance; for example, a child window is clipped so that no part of the child window can appear outside the borders of its parent window.

A window that has no parent, or whose parent is the desktop window, is called a top-level window. An application can use the EnumWindows function to obtain a handle to each top-level window on the screen. EnumWindows passes the handle to each top-level window, in turn, to an application-defined callback function, EnumWindowsProc.

A top-level window can own, or be owned by, another window. An owned window always appears in front of its owner window, is hidden when its owner window is minimized, and is destroyed when its owner window is destroyed. For more information, see Owned Windows.

A child window can have a child-window identifier, a unique, application-defined value associated with the child window. Child-window identifiers are especially useful in applications that create multiple child windows. When creating a child window, an application specifies the identifier of the child window. After creating the window, the application can change the window’s identifier by using the SetWindowLong function, or it can retrieve the identifier by using the GetWindowLong function.

Every window, except a child window, can have a menu. An application can include a menu by providing a menu handle either when registering the window’s class or when creating the window.

Application Instance Handle

Every application has an instance handle associated with it. The system provides the instance handle to an application when the application starts. Because it can run multiple copies of the same application, the system uses instance handles internally to distinguish one instance of an application from another. The application must specify the instance handle in many different windows, including those that create windows.

Creation Data

Every window can have application-defined creation data associated with it. When the window is first created, the system passes a pointer to the data on to the window procedure of the window being created. The window procedure uses the data to initialize application-defined variables.

Window Handle

After creating a window, the creation function returns a window handle that uniquely identifies the window. A window handle has the HWND data type; an application must use this type when declaring a variable that holds a window handle. An application uses this handle in other functions to direct their actions to the window.

An application can use the FindWindow function to discover whether a window with the specified class name or window name exists in the system. If such a window exists, FindWindow returns a handle to the window. To limit the search to the child windows of a particular application, use the FindWindowEx function.

The IsWindow function determines whether a window handle identifies a valid, existing window. There are special constants that can replace a window handle in certain functions. For example, an application can use HWND_BROADCAST in the SendMessage and SendMessageTimeout functions, or HWND_DESKTOP in the MapWindowPoints function.

Window Creation

To create application windows, use the CreateWindow or CreateWindowEx function. You must provide the information required to define the window attributes. CreateWindowEx has a parameter, dwExStyle, that CreateWindow does not have; otherwise, the functions are identical. In fact, CreateWindow simply calls CreateWindowEx with the dwExStyle parameter set to zero. For this reason, the remainder of this overview refers only to CreateWindowEx.

This section contains the following topics:

There are additional functions for creating special-purpose windows such as dialog boxes and message boxes. For more information, see DialogBox, CreateDialog, and MessageBox.

Main Window Creation

Every Windows-based application must have WinMain as its entry point function. WinMain performs a number of tasks, including registering the window class for the main window and creating the main window. WinMain registers the main window class by calling the RegisterClass function, and it creates the main window by calling the CreateWindowEx function.

Your WinMain function can also limit your application to a single instance. Create a named mutex using the CreateMutex function. If GetLastError returns ERROR_ALREADY_EXISTS, another instance of your application exists (it created the mutex) and you should exit WinMain.

The system does not automatically display the main window after creating it; instead, an application must use the ShowWindow function to display the main window. After creating the main window, the application’s WinMain function calls ShowWindow, passing it two parameters: a handle to the main window and a flag specifying whether the main window should be minimized or maximized when it is first displayed. Normally, the flag can be set to any of the constants beginning with the SW_ prefix. However, when ShowWindow is called to display the application’s main window, the flag must be set to SW_SHOWDEFAULT. This flag tells the system to display the window as directed by the program that started the application.

If a window class was registered with the Unicode version of RegisterClass, the window receives only Unicode messages. To determine whether a window uses the Unicode character set or not, call IsWindowUnicode.

Window-Creation Messages

When creating any window, the system sends messages to the window procedure for the window. The system sends the WM_NCCREATE message after creating the window’s nonclient area and the WM_CREATE message after creating the client area. The window procedure receives both messages before the system displays the window. Both messages include a pointer to a CREATESTRUCT structure that contains all the information specified in the CreateWindowEx function. Typically, the window procedure performs initialization tasks upon receiving these messages.

When creating a child window, the system sends the WM_PARENTNOTIFY message to the parent window after sending the WM_NCCREATE and WM_CREATE messages. It also sends other messages while creating a window. The number and order of these messages depend on the window class and style and on the function used to create the window. These messages are described in other topics in this help file.

Multithread Applications

A Windows-based application can have multiple threads of execution, and each thread can create windows. The thread that creates a window must contain the code for its window procedure.

An application can use the EnumThreadWindows function to enumerate the windows created by a particular thread. This function passes the handle to each thread window, in turn, to an application-defined callback function, EnumThreadWndProc.

The GetWindowThreadProcessId function returns the identifier of the thread that created a particular window.

To set the show state of a window created by another thread, use the ShowWindowAsync function.

Источник

Пошаговое руководство. создание традиционного классического приложения Windows (C++) Walkthrough: Create a traditional Windows Desktop application (C++)

В этом пошаговом руководстве показано, как создать традиционное классическое приложение Windows в Visual Studio. This walkthrough shows how to create a traditional Windows desktop application in Visual Studio. В примере приложения, которое вы создадите, будет использоваться API Windows для вывода «Hello, Windows Desktop!» The example application you’ll create uses the Windows API to display «Hello, Windows desktop!» «Hello, World!». in a window. Код, созданный в этом пошаговом руководстве, можно использовать в качестве шаблона для создания других классических приложений Windows. You can use the code that you develop in this walkthrough as a pattern to create other Windows desktop applications.

Для краткости в тексте пропущены некоторые операторы кода. For the sake of brevity, some code statements are omitted in the text. В разделе Построение кода в конце документа показан полный код. The Build the code section at the end of this document shows the complete code.

Предварительные требования Prerequisites

Компьютер под управлением Microsoft Windows 7 или более поздних версий. A computer that runs Microsoft Windows 7 or later versions. Для обеспечения оптимальной среды разработки рекомендуется использовать Windows 10. We recommend Windows 10 for the best development experience.

![Разработка классических приложений на C++](../build/media/desktop-development-with-cpp.png «»Разработка классических приложений на C++»;»)

Базовые значения об использовании интегрированной среды разработки Visual Studio. An understanding of the basics of using the Visual Studio IDE. Если вы уже использовали классические приложения для Windows, вы, вероятно, справитесь. If you’ve used Windows desktop apps before, you can probably keep up. Общие сведения см. в обзоре возможностей интегрированной среды разработки Visual Studio. For an introduction, see Visual Studio IDE feature tour.

Основные навыки владения языком C++. An understanding of enough of the fundamentals of the C++ language to follow along. Не волнуйтесь, мы не будем делать ничего сложного. Don’t worry, we don’t do anything too complicated.

Создание проекта для настольных систем Windows Create a Windows desktop project

Создание проекта для классических приложений Windows в Visual Studio 2019 To create a Windows desktop project in Visual Studio 2019

Теперь проект создан и исходный файл открыт в редакторе. Your project is now created and your source file is opened in the editor. Чтобы продолжить, перейдите к созданию кода. To continue, skip ahead to Create the code.

Создание проекта для классических приложений Windows в Visual Studio 2017 To create a Windows desktop project in Visual Studio 2017

Visual C плюсом > Windows Desktop, выбранный параметр «Мастер настольных систем Windows» и Десктопапп, введенное в текстовое поле «имя».» title=»Назовите проект Десктопапп.» data-linktype=»relative-path»> Visual C plus plus > Windows Desktop selected, the Windows Desktop Wizard option highlighted, and DesktopApp typed in the Name text box.» title=»Name the DesktopApp project» data-linktype=»relative-path»>

Теперь проект создан и исходный файл открыт в редакторе. Your project is now created and your source file is opened in the editor. Чтобы продолжить, перейдите к созданию кода. To continue, skip ahead to Create the code.

Создание проекта для классических приложений Windows в Visual Studio 2015 To create a Windows desktop project in Visual Studio 2015

> Visual C плюсом > Win32, выделенным параметром проекта Win32 и Десктопапп, введенным в текстовом поле «имя».» title=»Назовите проект Десктопапп.» data-linktype=»relative-path»> Templates > Visual C plus plus > Win32 selected, the Win32 Project option highlighted, and DesktopApp typed in the Name text box.» title=»Name the DesktopApp project» data-linktype=»relative-path»>

Теперь проект создан и исходный файл открыт в редакторе. Your project is now created and your source file is opened in the editor.

Создание кода Create the code

Далее вы узнаете, как создать код для классического приложения Windows в Visual Studio. Next, you’ll learn how to create the code for a Windows desktop application in Visual Studio.

Запуск классического приложения Windows To start a Windows desktop application

Точно так же, как каждое приложение C и приложение C++ должно иметь main функцию в качестве отправной точки, каждое классическое приложение Windows должно иметь WinMain функцию. Just as every C application and C++ application must have a main function as its starting point, every Windows desktop application must have a WinMain function. WinMain имеет следующий синтаксис: WinMain has the following syntax.

Сведения о параметрах и возвращаемом значении этой функции см. в разделе WinMain Entry Point. For information about the parameters and return value of this function, see WinMain entry point.

Дополнительные сведения см. в разделе Процедуры окна. For more information, see Window Procedures.

Добавление функциональных возможностей в функцию WinMain To add functionality to the WinMain function

Дополнительные сведения о полях приведенной выше структуры см. в разделе вндклассекс. For information about the fields of the structure above, see WNDCLASSEX.

Зарегистрируйте в WNDCLASSEX Windows, чтобы он знал о вашем окне и способах отправки в него сообщений. Register the WNDCLASSEX with Windows so that it knows about your window and how to send messages to it. Воспользуйтесь функцией RegisterClassEx и передайте структуру класса окна в качестве аргумента. Use the RegisterClassEx function and pass the window class structure as an argument. Этот _T макрос используется, так как мы используем TCHAR тип. The _T macro is used because we use the TCHAR type.

На этом этапе окно было создано, но нам по-прежнему нужно сообщить Windows, что он стал видимым. At this point, the window has been created, but we still need to tell Windows to make it visible. Вот что делает этот код: That’s what this code does:

Для обработки сообщений сначала нужно добавить цикл обработки сообщений для прослушивания сообщений, отправляемых Windows. To handle the messages, we first add a message loop to listen for the messages that Windows sends. Когда приложение получает сообщение, этот цикл отправляет его в вашу WndProc функцию для обработки. When the application receives a message, this loop dispatches it to your WndProc function to be handled. Цикл обработки сообщений напоминает приведенный ниже код. The message loop resembles the following code.

Дополнительные сведения о структурах и функциях, используемых в цикле обработки сообщений, см. в разделах, посвященных MSG, GetMessage, TranslateMessageи DispatchMessage. For more information about the structures and functions in the message loop, see MSG, GetMessage, TranslateMessage, and DispatchMessage.

На этом этапе функция WinMain должна напоминать приведенный ниже код. At this point, the WinMain function should resemble the following code.

Добавление функциональных возможностей в функцию WndProc To add functionality to the WndProc function

Одно важное сообщение для обработчика — WM_PAINT сообщение. One important message to handle is the WM_PAINT message. Приложение получает сообщение, WM_PAINT когда часть его отображаемого окна необходимо обновить. The application receives the WM_PAINT message when part of its displayed window must be updated. Это событие может возникать, когда пользователь перемещает окно перед окном, а затем снова перемещает его. The event can occur when a user moves a window in front of your window, then moves it away again. Приложение не знает, когда происходят эти события. Your application doesn’t know when these events occur. Только Windows знает, поэтому она уведомляет ваше приложение с WM_PAINT сообщением. Only Windows knows, so it notifies your app with a WM_PAINT message. При первом отображении окна его все должно быть обновлено. When the window is first displayed, all of it must be updated.

Для обработки сообщения WM_PAINT сначала вызовите метод BeginPaint, далее обработайте логику расположения текста, кнопок и других элементов управления в окне, а затем вызовите метод EndPaint. To handle a WM_PAINT message, first call BeginPaint, then handle all the logic to lay out the text, buttons, and other controls in the window, and then call EndPaint. Для приложения логика между начальным вызовом и завершающим вызовом отображает строку «Hello, Windows Desktop!» For the application, the logic between the beginning call and the ending call displays the string «Hello, Windows desktop!» «Hello, World!». in the window. В следующем коде функция Text используется для вывода строки. In the following code, the TextOut function is used to display the string.

HDC в коде — это обработчик контекста устройства, который используется для рисования в клиентской области окна. HDC in the code is a handle to a device context, which is used to draw in the window’s client area. Используйте BeginPaint функции и EndPaint для подготовки и завершения рисования в клиентской области. Use the BeginPaint and EndPaint functions to prepare for and complete the drawing in the client area. BeginPaint Возвращает маркер контекста устройства отображения, используемый для рисования в клиентской области. EndPaint завершает запрос на рисование и освобождает контекст устройства. BeginPaint returns a handle to the display device context used for drawing in the client area; EndPaint ends the paint request and releases the device context.

Сборка кода Build the code

Как обещано, вот полный код для рабочего приложения. As promised, here’s the complete code for the working application.

Сборка примера To build this example

Удалите код, введенный в хелловиндовсдесктоп. cpp в редакторе. Delete any code you’ve entered in HelloWindowsDesktop.cpp in the editor. Скопируйте этот пример кода и вставьте его в хелловиндовсдесктоп. cpp : Copy this example code and then paste it into HelloWindowsDesktop.cpp :

Поздравляем! Congratulations! Вы выполнили это пошаговое руководство и создали традиционное классическое приложение для Windows. You’ve completed this walkthrough and built a traditional Windows desktop application.

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