Lets say that I have a string - inside the string is a sum that reads 3 + 4

Now I read the string a char at a time and know how to sperate the int values, but is it possible to convert the + operator so that I can get VB.net to carry out this sum? just as I can convert strings into a int32 value, can I convert the + into a operator value?

Any help would be cool

thanks :-)