Method that creates a new attribute in the attribute set. The created Attribute object is returned.
| Name | Type | Description |
| AttributeName | String | Input String value that specifies the name of the attribute. The name must be unique with respect to the other attributes within this attribute set. If it is not unique, a failure will occur. A failure will also occur if the name contains a space. |
| ValueType | ValueTypeEnum | Input value from that specifies the type of the attribute. |
| Value | Variant | Input Variant value that specifies the value of the attribute. |