Find And Replace String Value in Tally

I have query that how can i find the value and replace in tally
for example

Code:

[System: Formula]
rtgk : "hello sir here you can sale & purchase the items from our store"
[Function:sendDD]
$$StringFindandReplace : @@rtgk : "&" : "and"

for the above code I want to replace "&" with "and"
how can I do that ? please help me ...

 

[System: formula]

SMSSalPartyName1: $$StringFindAndReplace:$PartyLedgerName:"&":"and"

 

THANK YOU SIR ITS WORKING ....
GREAT SUPPORT FROM YOU .....

 

I want to replace "&" with " "and " " , is it possible ?