由于IE浏览器控件需要提供显示功能才能使用，所以不能在程序中用CreateOleObject取得一个实例后直接使用其属性和方法，否则程序在运行时会引起错误；这时需要用Delphi中提供的 “Import ActiveX Control”功能-Since the IE browser control using the need to provide display function can be used, so you can not get an instance CreateOleObject program directly after using its properties and methods, otherwise the program will cause an error at runtime　then need to use Delphi provided "Import ActiveX Control "function