Steps to write COM components in JavaScript_javascript tips

Scripting languages ​​that support these interfaces include: JavaScript/JScript, VBScript, Perl and Python, etc.
WSC has the following characteristics.
Ø Small and efficient;
Ø Easy to create, maintain and deploy;
Ø Provides the ability to create COM components;
Ø Provides the ability to access a large number of system services.
The core work of writing COM components in JavaScript is to complete a .wsc (Windows Scripting Component) file. The .wsc file is a standard XML file with the following format:



description="Description"
progid ="Program ID"
version="Version number"
classid="Type ID" remotable="true">










Describes the previously defined method or attribute name
]]>





The entire .wsc file consists of component declaration, method and attribute declaration, method and attribute description, method implementation, etc. The process of writing COM components using scripting languages ​​such as VBScript or JavaScript is the process of completing the .wsc file. Note: The execution performance of COM components written using scripting languages ​​such as VBScript or JavaScript cannot be compared with COM using executable binary files such as .dll and .ocx as carriers. Because scripting languages ​​cannot be compiled, but can only run on the host. The scripting host on the Windows platform is WSH (Windows Scripting Host), which is WINDOWSsystem32scrobj.dll. Calling a COM component written in a scripting language is actually a process of directly calling WSH and then having WSH execute the script program.