For u

void Api::Border(short x, short y, short w, short h, int c)
{
    const char drA = (int)218;
    const char ulA = (int)217;
    const char urA = (int)192;
    const char dlA = (int)191;
    const char hL = (int)196;
    const char vL = (int)179;
    setlocale(LC_ALL, "C");
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), {x,y});
    cout << drA;
    for (int i = 2; i < w; i++)
    {
        cout << hL;
    }
    cout << dlA;
    for (short i = 1; i < h - 1; i++)
    {
        SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), { x,y + i});
        cout << vL;
        SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), { x + w - 1,y + i });
        cout << vL;
    }
    SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), { x,y + h - 1});
    cout << urA;
    for (int i = 2; i < w; i++)
    {
        cout << hL;
    }
    cout << ulA;
}