Closing the Help documentation from command line

I have two callbacks which perform the following to display some help documentation for two processes A & B

web('D:\Users\..\A\Doc\index.html')

web('D:\Users\..\B\Doc\index.html')

The "B" process has an info.xml file paired with helptoc.xml file so displays as custom documentation.

The "A" process doesn't have these and so just opens a web browser to display the help.

I want to be able to close both the above automatically as I'm just testing the callbacks work. My issue is that when I use [stat,h] = web(___), "A" returns a handle to the web browser that allows me to close it using the command close(h). However "B" just returns an empty h, so I don't know how to close it.

So, how do I close that "custom documentation" help window without having to do it manually? Thanks in advance for help with this.