Converts a Base 64 string representation into a byte array.
byte[]FROMBASE64(string value)
FROMBASE64("Q29udmVydHMgYSBCYXNlIDY0IHN0cmluZyByZXByZXNlbnRhdGlvbiBiYWNrIGludG8gYSBCeXRlIEFycmF5")
Will return "Converts a Base 64 string representation back into a Byte Array".