给LISTBOX组件增加水平滚动条 获取RICHEDIT组件中光标所在的行号 消除在EDIT组件中按下回车键时的蜂鸣声 运行时拖动组件 在LISTBOX和COMBOBOX组件中实现自动搜索 在SPEEDBUTTON组件上使用图标-LISTBOX component to increase the horizontal scroll bar to obtain RICHEDIT component line number where the cursor is to elimi

Delphi为ListBox组件添加水平滚动条，编程学习源码，很好的参考资料。-Delphi add a horizontal scroll bar for the ListBox component, learning programming source code, a good reference.