| Name | Type | Options | Opt/Req | Description |
| checkString | 3000A | Const Varying | Req | The subject string to check. |
| fromString | 3000A | Const Varying | Req | The low string comparator. |
| toString | 3000A | Const Varying | Req | The high string comparator. |
| ignoreCase | N | Const | Opt | Indicates whether or not to ignore the case in the comparison. If ignoreCase is not sent then case is NOT ignored. |
| Returns: | N | n/a | n/a | *ON if the checkString is within the range and *OFF if it is not. |