文件名称:list
- 所属分类：
- Windows编程
- 资源属性：
- [Windows] [Visual C] [Basic/ASP] [源码]
- 上传时间：
- 2012-11-26
- 文件大小：
- 1kb
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- 0次
- 提 供 者：
- b***
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Provide a Horizontal Scroll Event for a Listbox
Subclassing a listbox allows you to monitor horizontal scrolling. To subclass a listbox, you store the original WndProc in the UserData area of the listbox, allowing a single replacement of WndProc to work for all ListBox controls. WndProc notifies your form of a horizontal scroll message by sending a WM_MOUSEMOVE message with negative coordinates. The MouseMove event receives negative X and Y values, plus a Button value when horizontally scrolled, which is impossible under normal operation. Be sure to restore the original WndProc in the Form_Unload event:
Subclassing a listbox allows you to monitor horizontal scrolling. To subclass a listbox, you store the original WndProc in the UserData area of the listbox, allowing a single replacement of WndProc to work for all ListBox controls. WndProc notifies your form of a horizontal scroll message by sending a WM_MOUSEMOVE message with negative coordinates. The MouseMove event receives negative X and Y values, plus a Button value when horizontally scrolled, which is impossible under normal operation. Be sure to restore the original WndProc in the Form_Unload event:
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