怎么实现滚动字

Question

void   label1_Paint(object   sender,   System.Windows.Forms.PaintEventArgs   e) 
{ 
Label  lb=sender as Label; 
e.Graphics.DrawString(lb.Text,lb.Font,Brushes.Black,new   PointF(paintX,0)); 
} void   timer_Tick(object   sender,   EventArgs   e) 
{ 
paintX=(++paintX)%label1.Width; 
label1.Invalidate(); 
}或
private void Form1_Load(object sender, EventArgs e)
        {
            this.label1.Location = new Point(0, 0);
        }        int xPox = 0;
        bool ist = true;
        private void timer1_Tick(object sender, EventArgs e)
        {
            this.label1.Location = new Point(xPox,this.label1.Location.Y);
            if (xPox == this.Width-this.label1.Size.Width)
                ist = false;
            if(xPox==0)
                ist = true;
            if (ist)
                xPox++;
            else
                xPox--;
        }