Using methods in object spy we can write scripts.
using step generator we can write scripts.

first of all, by recording, scripts can be automatically 
generated. other ways include through editing scripts, 
using step generator, capturing through text check points 
and through descriptive programming

HI This is Chakravarthy.

If u know "C" language it is very easy to write VB Script.

and u have to know how can we use Scripting in QTP.

for ex. we wil use if conditions,nested if,for loops,while 
loop,variable diclarations,functions,......etc in QTP.

all this topics come under "C" Language.

If u have any Queries contact me at 

           mskalyan.smile@gmail.com