ACTIVEX

utilities from Microsoft Corporation that combine older Object Linking and Embedding (OLE) and Component Object Model (COM) utilities. AcitiveX is usually coded in Visual Basic and is quite confusing since it is an outgrowth of a complex set of OLE and COM technologies. Various ActiveX applications can be downloaded from http://www.download.com/PC/Activex/0,271,0-0,00.html . One of the most widespread applications is to give interactive controls (e.g., ask questions, provide answers, perform computations, push buttons, etc.) to users of Internet Explorer on the web. Therein lies a huge risk as well when computers also have Windows Scripting Host (WSH) utilities using ActiveX. WSH files have a file extension whs and are similar to PIF files in older 16-bit applications. Prior to WSH applications, users could browse the web and use email without any worries about virus infections as long as security warnings were heeded about file downloads that run in Microsoft Word, Excel, etc. That is no longer the case if WSH utilities are installed. To avoid such risks, users can either rely upon Netscape products for email and web browsing since Netscape products use Java rather than ActiveX software. If users prefer Microsoft Internet Explorer for web browsing and Microsoft Outlook for email, then they may want to consider adding security barriers to WSH risks. In Internet Explorer you can click on menu choices (View, Internet Options, Security, Custom, Settings) and choose the option to disable "ActiveX Controls Not Marked as Safe." Repeat the same procedure for Microsoft Outlook and Outlook Express. You may also want to consider disabling WSH, although you thereby lose the applications relying on WSH utilities. For virus updates and news, two good web sites are Network Associates at http://www.nai.com/vinfo/ and Mcafee at http://www.mcafee.com/ . (Also see Visual Basic and CORBA ) For more information on the use of ActiveX in distributed network computing, see Database, ADO, and RDS .