Realization of merry-go effect under WinForm

The recent need to implement a merry-go effect in the WinForm project, the beginning of a number of methods such as mobile label control, the effect is always not very good, moving text always has a flicker phenomenon. Later found a foreign open source control, applied a bit, the effect is not bad. Carefully read the code, found that there are some areas worth improving, and now put the code and changes to the description, and share with you.

Source of Control: http://www.codeproject.com/KB/miscctrl/ScrollingTextControlArtic.aspx

My changes:

1, the DoubleBuffer setting

This is used in the original code. SetStyle (Controlstyles.doublebuffer, true); But some netizens have reflected that this sign is not valid for. NET 2.0 version. To tell you the truth, I'm not particularly sure that MSDN doesn't say that. In my. NET 2.0 system, the effects of the two settings do not seem to be much different. On a foreign website to find their differences, the following is the original:

ControlStyles = CS

AllPaintingInWmPaint = = APWMP

Optimizeddoublebuffer = ODB

DoubleBuffer = DB

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

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 ' t a isn for DB.
ControlStyle . ODB	None	None	No	Works, but without apwmp set for you ' ll-buffer foreground and background separately and'll still the flicker.
Control . DoubleBuffered	Sets CS. ODB, CS. Apwmp	None	No	Works for most mainstream buffering needs. The Getter is peculiar the it only checks CS. ODB.