In two ways we can create data table

1)By creating different actions in test we can create data 
table for that action.
2)Dynamically we can create data table as
datatable.addsheet <sheet name>

The created sheet called as virtual sheet and we can call 
it in any action by using

datatable.getsheet "sheet name" method

The created shhet in virtual sheet then we can cal any 
where in the program

Datatable.getsheet"Sheetname"

'Add New sheet in Datatable
 
Set a = Datatable.AddSheet("Kumar")
msgbox a

a)	In QTP add the new sheet is possible in two types. They are
b)	In Different action: Here possible to create the any
actions of recording 
c)	And condition of new sheet in data table: Here give the
syntax then create the new sheet. That is
d)	Data table .get sheet “sheet name”
e)	The above method is call virtual method

Hi This is K.Chandra Sekhar
If any query then send to mail ndra_143@yahoo.co.in
I am taking the testing projects FAQS class
Call 9246540049/65880049
In Hyderabad

To Add a new sheet first we need to give the reference for 
the sheet i.e
Datatable.getsheet("sheetname")
//sheet namehere can be global or local//
then add this statement
Datatable.addsheet("sheetname")
If you want to give the column name and its value include
Datatable.addsheet("dtglobal/Action1")"Username","ABC"
Thanks.