![]() 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. The system manages most aspects of the nonclient area the application manages the appearance and behavior of its client 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. For more information, see Window Procedures. The application must provide a function, called a window procedure, to process input to the window and display output in the client area. For example, a desktop publishing application displays the current page of a document in the client area. The client area is the part of a window where the application displays output, such as text or graphics. The following illustration shows these components in a typical main window. An application's main window typically includes all of these components. When the application is active, its taskbar button is displayed in the pushed state.Īn 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. The taskbar button contains the program icon and title. When you start an application, the system also associates a taskbar button with the application. Each window plays a part in displaying output and receiving input from the user. Most applications also create other windows, either directly or indirectly, to perform tasks related to the main window. Application WindowsĮvery 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. 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. ![]() ![]() The GetDesktopWindow function returns a handle to the desktop window.Ī 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. bmp file specified in the registry as the desktop wallpaper. By default, the desktop window uses the bitmap from a. The pattern created by the bitmap is called the desktop wallpaper. The desktop window uses a bitmap to paint the background of the screen. 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. When you start the system, it automatically creates the desktop window. The overview includes the following topics. ![]() Type in “winver.This topic describes the programming elements that applications use to create and use windows manage relationships between windows and size, move, and display windows. Press the Windows key (at the bottom of the keyboard, looks like four squares) and R key at the same time to open the Run dialog box. It doesn’t matter which method you use what’s important is figuring out which operating system you have. If you have determined that you are running Windows, there are many methods to determine your specific operating system, not all of which are listed here. A Windows logo means you are running Windows, while an Apple logo means you are running macOS. As the operating system boots up, it will display a logo. If the answer to any of those questions is yes, then you most likely have a computer that runs macOS.Īnother good way to see whether you are running Windows or Mac is simply to turn the computer on.
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