winfrom 减少闪烁

winfrom 反射实现ListView 和 DataGridView 双缓冲功能

1	lv.GetType().GetProperty("DoubleBuffered", BindingFlags.Instance \| BindingFlags.NonPublic).SetValue(dgv, true, null);

protected override void WndProc(ref Message m)  
{      
	if (m.Msg == 0x0014) // 禁掉清除背景消息        
 	return;      
	base.WndProc(ref m);  
}

this.SetStyle(ControlStyles.DoubleBuffer |     
	ControlStyles.UserPaint |    
	ControlStyles.AllPaintingInWmPaint,    
	true); 
	this.UpdateStyles();