Winform下无闪烁走马灯效果实现

Winform下无闪烁走马灯效果实现2011-06-28肖波最近需要在Winform项目中实现一个走马灯的效果，一开始用了一些办法比如移动Label控件，效果总是不太好，移动文本时总有闪烁的现象。后来找了一个国外的开源控件，应用了一下，效果还不错。仔细阅读了一下代码，发现还有一些地方值得改进，现把代码以及改动说明贴出来，和大家分享。

控件出处：http://www.codeproject.com/KB/miscctrl/ScrollingTextControlArtic.aspx

我的改动：

1、DoubleBuffer 的设置

原代码中用的是 this.SetStyle（ControlStyles.DoubleBuffer, true）; 但一些网友反映这个标志在.net 2.0 以上版本无效。说句老实话，我也不是特别确信，MSDN上也没有说明这一点。在我的.net 2.0 系统中，两种设置的效果似乎没有太多区别。在一个国外网站上找到他们的区别，下面是原文：

ControlStyles == CS

AllPaintingInWMPaint == APWMP

OptimizedDoubleBuffer = ODB

DoubleBuffer = DB

An earlier permutation of the design called for ODB to simply be a combinationof DB, APWMP and UserPaint. Through several design changes, the two control styles are nearly synonymous, but they still have differences. Now that we"ve broken that, we may considerun-deprecating CS.DB to retain . Here is a more complete summary of the current design:

Mechanism	Side effects	Other flags required to work	Require APWMP？	Notes
ControlStyle .DB	none	APWMP, UserPaint	Yes	We are considering NOT deprecating this flag because ODB isn"t an exact replacement for DB.
ControlStyle .ODB	none	none	No	Works, but without APWMP set you"ll buffer foreground and background separately and will still see flicker.
Control .DoubleBuffered	sets CS.ODB, CS.APWMP	none	No	Works for most mainstream buffering needs. Getter is peculiar in that it only checks CS.ODB.