C#里面怎么处理Windows message

private void button1_Click(object sender, EventArgs e)
{   
    long inputNum = long.Parse(this.textBox1.Text);//首先将其反向转换成DateTime对象：   
    long Ticks = inputNum / 100;    //将其先转换成long ticks(刻度为100纳秒),
    DateTime dTime = new DateTime(Ticks);    //再通过格式转换
    this.textBox2.Text = dTime.ToUniversalTime().ToString();
}