求上下滚动文本的算法！~~~~~~~~~~~~~~~~~~~~

[chenyec]

各位帮帮忙！用API！

[vcmute]

ScrollWindowEx
The ScrollWindowEx function scrolls the contents of the specified window's client area.

int ScrollWindowEx(
HWND hWnd, // handle to window
int dx, // horizontal scrolling
int dy, // vertical scrolling
CONST RECT *prcScroll, // client area
CONST RECT *prcClip, // clipping rectangle
HRGN hrgnUpdate, // handle to update region
LPRECT prcUpdate, // invalidated region
UINT flags // scrolling options
);

[vcmute]

http://msdn.microsoft.com/library/en-us/shellcc/platform/commctls/scrollbars/usingscrollbars.asp?frame=true#example1

[i_noname]

其实就是文本显示范围的问题，参看programming windows中的chapter9--child window controls中的The Scroll Bar Class，上面有详细的说明

[summer54]

mark

[chenyec]

http://msdn.microsoft.com/library/en-us/shellcc/platform/commctls/scrollbars/usingscrollbars.asp?frame=true#example1


就是用这个算法下滚时花屏，上滚白屏，不知那里错了！都快急死了！各位帮帮我！