Sets or removes user text stored in the document. For more details on User Text, see the discussion found in the User Data Methods summary.
Rhino.SetDocumentUserText (strKey [, strValue])
| strKey | Required. String. The key name to set. | 
| strValue | Optional. String. The string value to set. If omitted the key/value pair specified by strKey will be deleted. | 
| Boolean | True or False indicating success or failure. | 
| Null | If not successful, or on error. | 
Rhino.SetDocumentUserText "Designer", "Dale Fugier"
Rhino.SetDocumentUserText "Notes", "Added some layer and updated some geometry"