comboextend类，实现下拉框的智能检索功能，自动匹配已有内容，方便输入-comboextend category, the drop-down box to achieve intelligent search capabilities, automatic matching has been content to facilitate the importation

此代码通过派生组合框类来实现浏览图标的。-The adoption of this code derived type combo box to achieve the browser icon.

自定义的combox小程序，结合DEV的comboxEx程序的小应用-Combox custom applets, small applications combined with the comboxEx DEV program