String Functions
Instr - Find position of a substring
Lcase - shift all letters in a string to lowercase
Left - take the leftmost substring of a string
Len - return the length of a string
LTrim - Trim whitespace from the left side of a string
Mid - return a substring of string
Right - take the rightmost substring of a string
RTrim - Trim whitespace from the right of a string
Trim - Trim leading and trailing whitespace from a string
UCase - Shift all the letters in a string to uppercase