public class NumericUpDownFix : System.Windows.Forms.NumericUpDown
{
    protected override void OnValueChanged(EventArgs e)
    {
        if (Value > _value)
        {
            LastDirection = 1;
        }
        else if (Value < _value)
        {
            LastDirection = -1;
        }
        else
        {
            LastDirection = 0;
        }
        _value = Value;
        base.OnValueChanged(e);
    }

    protected override void OnClick(EventArgs e)
    {
        base.OnClick(e);
        LastDirection = 0;
    }

    private decimal _value;
    public int LastDirection = -2;
}