Just a guess here
Everything, Including brackets and punctuation marks, that are inside double quotes is a String.
Esc is not a printable character so the Strings before and after must be Concatenated (&) with it. In fact "ESC" is a Variable whose Value is the nonprinting value of the Esc key.
HT looks like a variable, but may be a special character, like Esc.
As for exactly what "[10;44H" means, you would need to look at a complete and verbose log of the entire transaction to possibly determine that.
I would bet that the "NEVER_TIME_OUT" Wait option means that the script is going to "hang" at each line until it receive the exact uppercase String it's waiting for.And will not show an error. Ever.
You should read the WaitForStrings3 man page on your Unix system.
I found this on the Net: http://docs.attachmate.com/reflectio...forstrings.htm Also click the ShowTableOfContents link thereon.
In order to get better help, you need to provide great detail on what scripting languages, applications, and systems you are working with as well as what you are trying to do.