InvokePaintBackground( );使用
请问InvokePaintBackground( ); 的参数应该怎么写

功能是为了实现 窗口颜色的渐变

C# code

private void button2_Click(object sender, EventArgs e){InvokePaintBackground( );this.Hide( );this.Visible=true;}protected override void OnPaintBackground(PaintEventArgs e)        {            int y, dy;            y = this.ClientRectangle.Location.Y;            dy = this.ClientRectangle.Height / 256;            for (int i = 255; i >= 0; i--)            {                Color c = new Color();                c = Color.FromArgb(Convert.ToInt32(textBox1.Text.ToString()), i, Convert.ToInt32(textBox2.Text.ToString()));                SolidBrush sb = new SolidBrush(c);                Pen p = new Pen(sb, 1);                e.Graphics.DrawRectangle(p, this.ClientRectangle.X, y, this.Width, y + dy);                y = y + dy;            }        }

[解决办法]
为啥不用
渐变色画刷
LinearGradientBrush

[解决办法]
InvokePaintBackground 是调用吧 没用过 我猜里面应该放委托 写个函数名就行