silikonjazz.blogg.se - Game buffer visual basic power pack 9.0.0.0 download

More information about preferring virtual terminal sequences can be found in the classic functions versus virtual terminal document. It is recommended to use virtual terminal sequences to query this position if necessary for advanced layouts. Using the low-level functions to find the cursor position is discouraged.

If you move the cursor, text at the new cursor location is overwritten. You can use SetConsoleCursorPosition to set the cursor position and, thereby, control the placement of text that is written or echoed by the high-level I/O functions. To determine the current cursor position in the coordinate system of a screen buffer, use GetConsoleScreenBufferInfo. To set the appearance and visibility of the cursor, use the SetConsoleCursorInfo function.Ĭharacters written by the high-level console I/O functions are written at the current cursor location, advancing the cursor to the next location. This function reports whether the cursor is visible and describes the appearance of the cursor as the percentage of a character cell that it fills. To retrieve information about the appearance and visibility of the cursor, use the GetConsoleCursorInfo function. When it is visible, its appearance can vary, ranging from completely filling a character cell to appearing as a horizontal line at the bottom of the cell. Cursor Appearance and PositionĪ screen buffer's cursor can be visible or hidden. Please see our discussion on classic console APIs versus virtual terminal for more information. Alternate buffer mode offers increased compatibility across remote devices and with other platforms. It is recommended to use the alternate buffer mode going forward, if possible, instead of creating a second screen buffer for this purpose. This cooperative behavior is required to ensure that other applications sharing the same console session are not impacted by the changes. To retrieve the current values of the various properties associated with the console screen buffer, use the GetConsoleScreenBufferInfo, GetConsoleCursorInfo, and GetConsoleMode functions.Īpplications that change any of the console screen buffer properties should either create their own screen buffer or save the state of the inherited screen buffer during startup and restore it at exit. The size of the console screen buffer, the window size, the text attributes, and the appearance of the cursor are determined by the user or by the system defaults. Its cursor is visible and positioned at the buffer's origin (0,0), and the window is positioned with its upper left corner at the buffer's origin. When a screen buffer is created, it contains space characters in every position. For more information about console output modes, see High-Level Console Modes.

Output modes ( ENABLE_PROCESSED_OUTPUT and ENABLE_WRAP_AT_EOL_OUTPUT).

Cursor position, appearance, and visibility.

Window size and location (the rectangular region of the console screen buffer that is displayed in the console window).

Text attributes (foreground and background colors for displaying text to be written by the WriteFile or WriteConsole function).

Screen buffer size, in character rows and columns.

The properties associated with a screen buffer include: This means that changing the active screen buffer can have a dramatic effect on the appearance of the console window. The data for each character is stored in a CHAR_INFO structure that specifies the Unicode or ANSI character and the foreground and background colors in which that character is displayed.Ī number of properties associated with a screen buffer can be set independently for each screen buffer. However, screen buffers can be accessed for reading and writing whether they are active or inactive.Įach screen buffer has its own two-dimensional array of character information records. A new screen buffer is not active until its handle is specified in a call to the SetConsoleActiveScreenBuffer function. A process can use the CreateConsoleScreenBuffer function to create additional screen buffers for its console.

To open a handle to a console's active screen buffer, specify the CONOUT$ value in a call to the CreateFile function. The system creates a screen buffer whenever it creates a new console. The active screen buffer is the one that is displayed on the screen. A console can have multiple screen buffers. A screen buffer is a two-dimensional array of character and color data for output in a console window.