窗体上的lblel渐变效果用timer控制

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   private void timerMessage_Tick(object sender, EventArgs e)        {           timerMessage.Enabled = true;            Graphics g = lblMessages.CreateGraphics();//创健控件的Graphics类            g.Clear(Color.White);//以指定的颜色清除控件背景            Color Var_Color_Up = Color.Red;//设置前景色            Color Var_Color_Down = Color.Yellow;//设置背景色            Font Var_Font = new Font("宋体", 10);//设置字体样式            string Var_Str = lblMessages.Text;//设置字符串            SizeF Var_Size = g.MeasureString(Var_Str, Var_Font);//获取字符串的大小            PointF Var_Point = new PointF(5, 5);            RectangleF Var_Rect = new RectangleF(Var_Point, Var_Size);            LinearGradientBrush Var_LinearBrush = new LinearGradientBrush(Var_Rect, Var_Color_Up, Var_Color_Down, LinearGradientMode.Horizontal);            g.DrawString(Var_Str, Var_Font, Var_LinearBrush, Var_Point);        }

第二种

<pre name="code" class="csharp"> Color Var_Color_Up = Color.Red;//设置前景色            Color Var_Color_Down = Color.Yellow;//设置背景色            Font Var_Font = new Font("宋体", 10);//设置字体样式            string Var_Str = lblMessages.Text;//设置字符串            Graphics g = lblMessages.CreateGraphics();//创健控件的Graphics类            SizeF Var_Size = g.MeasureString(Var_Str, Var_Font);//获取字符串的大小            Brush brush = Brushes.Blue;            g.Clear(Var_Color_Up);//清除背景            string temp;            PointF p;            if (temp != Var_Str)//文字改变时,重新显示            {                p = new PointF(this.lblMessages.Size.Width, 0);                temp = Var_Str;            }            else                p = new PointF(p.X - 10, 0);//每次偏移10            if (p.X <= -Var_Size.Width)                p = new PointF(this.lblMessages.Size.Width, 0);            g.DrawString(Var_Str, Var_Font, brush, p);

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