Retrieving XML values

I have a textbox in which I want to enter text which may include HTML tags.
I have a function to convert the tags to rendered HTML o/p
What i want to know is how do u retrieve the data from the XML object so I can iterate through the data and see if i have any text with HTML tags. the function I have takes a string as an i/p. this is done in VBscript. any help will be appreciated.

re: Retrieving XML values

Sorry, what XML object?

Why not just type input and output instead of i/p and o/p? these abbreviations aren't standard and only hasten confusion.