C#学习Timer

      Timer类提供以指定的时间间隔执行方法的机制。此类不能继承。Timer能有规律的以一定的时间间隔激发timer事件，而执行相应的程序代码。Timer控件的Interval属性表示两个计时器事件之间的时间间隔，其值以ms为单位。Timer将每隔Interval触发一次计时器事件Tick。如：

namespace mytimer
{
   public partial class Timer:Form
  {
      public Timer()
      {
       InitializeComponent();
       }
private int direction = 5;

private void frmTimer_Load(object sender,EventArgs e)
{
       cbInterval.SelectedIndex = 1;
}

private void btnMove_Click(object sender,EventArgs e)
{
       timer1.Enabled = true;
}

private void timer_Tick(object sender,EventArgs e)
{
       if(lblLogo.Left <= 0|| lblLogo.Right >= this.Width)
       {
            direction = -direction;
       }
       lblLogo.Left -= direction;
}

private void cbInterval SelectedIndexChanged(object sender,EventArgs e)
{
       timer1.Interval = int.Parse(cbInterval.Text);
} 
}