What is the difference between CreateObject and Wscript.CreateObject?
Does anyone know the reasoning behind having the option using:
Wscript.CreateObject("some.object")
and
CreateObject("some.object")
within VBScript? when I find documentation or examples that use Wscript.CreateObject, I usually rewrite using CreateObject, because it always seems to work, and then I can easily reuse the code within an HTA or ASP. But I've always wondered why this feature existed and if what difference it makes if you use one way or another within VBScript.
Answer
There's no difference between the two, when you call them with just one argument. The do exactly the same thing.
The difference between the two is only in evidence if you call with two parameters. The statements
Wscript.CreateObject("some.object", "AnotherParam")
and
CreateObject("some.object", "AnotherParam")
do completely different things:
The VBScript CreateObject function interprets the second parameter as a remote computer name and tries to create the named COM object on that remote computer; in this example, it tries to instantiate an instance of an object with ProgId of "some.object" on a remote computer named "AnotherParam". The WScript CreateObject method interprets the second parameter as a subroutine prefix to be used in handling events from the object. The two GetObject functions are similarly related.
(Adapted from TechNet, section "Comparing VBScript CreateObject and GetObject Functions with WSH".)