Determining LB and RB in correlation parameter

Hi, 

I am trying to capture the session value (bold and italicised) below and I am struggling to do it. Can someone help me determine the LB and RB in the expression, please? 

Here is the code, 

<div>
<input type="hidden" name="lt" value="LT-3421-nxfUSxJtd9456LE4zOcytzqbgtav7v" />

This is what I am doing, 

web_reg_save_param_ex("ParamName=LTValue",
"LB=\name\=\"lt\"\\value\=",
"RB=/>",
SEARCH_FILTERS,
"Scope=All",
LAST);