窗体中的滚动字幕，向左右，及来回滚动

private void timer_Tick(object sender,EventArgs e)
{
label1.Left -=2;
if(label1.Right<0)
{
label1.Left=this.Width;
}
}

int LeftToRight = 0;
private void timer1_Tick(object sender, EventArgs e)
{
if (label1.Right < 0)
{
label1.Left = this.Width;
LeftToRight = 0;
}
if (label1.Left < 0)
{
label1.Left = 0;
LeftToRight = 1;
}
if (label1.Right >= this.Width)
{
LeftToRight = 0;
}
if (LeftToRight == 0)
label1.Left -= 10;
else
label1.Left += 10;
}