ClearScreen4

#include <windows.h>

void ClearScreen() {
    HANDLE hStdOut;
    CONSOLE_SCREEN_BUFFER_INFO csbi;
    SMALL_RECT scrollRect;
    COORD scrollTarget;
    CHAR_INFO fill;
    hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
    // Get the number of character cells in the current buffer.
    if (!GetConsoleScreenBufferInfo(hStdOut, &csbi))
    {
        return;
    }
    // Scroll the rectangle of the entire buffer.
    scrollRect.Left = 0;
    scrollRect.Top = 0;
    scrollRect.Right = csbi.dwSize.X;
    scrollRect.Bottom = csbi.dwSize.Y;
    // Scroll it upwards off the top of the buffer with a magnitude of the entire height.
    scrollTarget.X = 0;
    scrollTarget.Y = (SHORT)(0 - csbi.dwSize.Y);
    // Fill with empty spaces with the buffer's default text attribute.
    fill.Char.UnicodeChar = TEXT(' ');
    fill.Attributes = csbi.wAttributes;
    // Do the scroll
    ScrollConsoleScreenBuffer(hStdOut, &scrollRect, NULL, scrollTarget, &fill);
    // Move the cursor to the top left corner too.
    csbi.dwCursorPosition.X = 0;
    csbi.dwCursorPosition.Y = 0;
    SetConsoleCursorPosition(hStdOut, csbi.dwCursorPosition);
}