Use to convert string to upper or lower case.
Lcase
Ucase

Trim leading are trailing spaces.
Ltrim
Rtrim

Get/Diplay then Leftmost/Rightmost Character.
Left
Right

Len - retuns the length of strings.
IsDate - Returns true if expression is a valid date format & false if not.
Date( ) - Returns the current system date.
CDate - Converts a valid expression into vbscript date format.(mm/dd/yy)
IsNumeric - Returns true if the value is numeric & false if not.