Return numbers in a string

You can use Evaluate

EVALUATE(Integer, string)

Now the 2nd question is this just a string containing numbers or does the string contain letter too that have to be removed?

Or did I get this wrong completely and you really want to take a phone number (as an example) and just get the numbers and leave out spaces, dashes, parenthasis, etc.

txtCharsToKeep := '0123456789'; 
"Phone No." := DELCHR("Phone No.",'=',DELCHR("Phone No.",'=',txtCharsToKeep));

Var txtCharsToKeep ->Type Text Size->30

code/

txtCharsToKeep := '0123456789'; 
"Your String" := DELCHR("Your String",'=',DELCHR("Your String",'=',txtCharsToKeep));

In your case you want a new string variable to contain the numbers only.

txtCharsToKeep := '0123456789'; 
"Your NEW String" := DELCHR("Your OLD String",'=',DELCHR("Your OLD String",'=',txtCharsToKeep));