What does GetStdHandle do?
The GetStdHandle() function gives us a mechanism for retrieving the standard input, STDIN, the Standard Output, STDOUT, and the standard error handles, STDERR. The GetStdHandle() function takes a single parameter that can be one of three values, STD_INPUT_HANDLE, STD_OUTPUT_HANDLE, and STD_ERROR_HANDLE.
What is GetStdHandle in c++?
GETStdHandle() retrieves a handle to the specified standard device here: STD_OUTPUT_HANDLE The standard output device. Initially, this is the active console screen buffer. SetConsoleTextAttribute Sets the foreground (text) and background color attributes of characters written to the console screen buffer.
What is STD output Handle?
When a console is created, the standard input handle is a handle to the console’s input buffer, and the standard output and standard error handles are handles of the console’s active screen buffer.
What is SetConsoleTextAttribute?
SetConsoleTextAttribute : Sets the attributes of characters written to the console screen buffer by the WriteFile or WriteConsole function, or echoed by the ReadFile or ReadConsole function. This function affects text written after the function call.
What is handle console in C++?
A console process uses handles to access the input and screen buffers of its console. The GetStdHandle function provides a mechanism for retrieving the standard input ( STDIN ), standard output ( STDOUT ), and standard error ( STDERR ) handles associated with a process.
What is Coord in C++?
Defines the coordinates of a character cell in a console screen buffer. The origin of the coordinate system (0,0) is at the top, left cell of the buffer.
What is standard input and output?
The standard input device, also referred to as stdin , is the device from which input to the system is taken. The standard output device, also referred to as stdout , is the device to which output from the system is sent. Typically this is a display, but you can redirect output to a serial port or a file.
How do I change the background color of my console in C++?
In C++ programming, the default background of the output screen is black and the text color is the white color, the task is to color both the background and text color in the output screen. console_color = GetStdHandle(STD_OUTPUT_HANDLE); // P is color code according to your need.
Which function is used to change the current background color?
Function textbackground is used to change current background color in text mode.
What is stdout file?
Stdout, also known as standard output, is the default file descriptor where a process can write output. In Unix-like operating systems, such as Linux, macOS X, and BSD, stdout is defined by the POSIX standard. Its default file descriptor number is 1. In the terminal, standard output defaults to the user’s screen.
What does getstdhandle do in Windows Console?
The GetStdHandle function provides a mechanism for retrieving the standard input ( STDIN ), standard output ( STDOUT ), and standard error ( STDERR) handles associated with a process. During console creation, the system creates these handles.
What is the return value of the getstdhandle function?
Return value. If the function succeeds, the return value is a handle to the specified device, or a redirected handle set by a previous call to SetStdHandle. The handle has GENERIC_READ and GENERIC_WRITE access rights, unless the application has used SetStdHandle to set a standard handle with lesser access.
What happens if the handle of getstdhandle fails?
The handle has GENERIC_READ and GENERIC_WRITE access rights, unless the application has used SetStdHandle to set a standard handle with lesser access. If the function fails, the return value is INVALID_HANDLE_VALUE.
When to use handles in the console function?
Handles returned by GetStdHandle can be used by the console functions if they have not been redirected to refer to something other than console I/O. If a standard handle has been redirected to refer to a file or a pipe, however, the handle can only be used by the ReadFile and WriteFile functions.