y = get_h() - BC_CancelButton::calculate_h() - 10;
x = get_w() - BC_CancelButton::calculate_w() - 10;
add_subwindow(new BC_CancelButton(x, y));
y = get_h() - BC_CancelButton::calculate_h() - 10;
x = get_w() - BC_CancelButton::calculate_w() - 10;
add_subwindow(new BC_CancelButton(x, y));