ClearScreen1

#include <windows.h>

void ClearScreen() {
    COORD topLeft  = { 0, 0 };
    HANDLE hStdOut;
    DWORD written;
    CONSOLE_SCREEN_BUFFER_INFO screen;
    DWORD dwConSize;
    hStdOut = GetStdHandle(STD_OUTPUT_HANDLE);
    GetConsoleScreenBufferInfo(hStdOut, &screen);
    dwConSize = screen.dwSize.X * screen.dwSize.Y;
    FillConsoleOutputCharacter(
        hStdOut, (TCHAR)' ', dwConSize, topLeft, &written
    );
    FillConsoleOutputAttribute(
        hStdOut, screen.wAttributes, dwConSize, topLeft, &written
    );
    SetConsoleCursorPosition(hStdOut, topLeft);
}