Sets or removes user text stored on a layer. For more details on User Text, see the discussion found in the User Data Methods summary.
Rhino.SetLayerUserText (strLayer, strKey [, strValue])
| strLayer | Required. String. The name or identifier of an existing layer. | 
| 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.SetLayerUserText "First Floor", "Description", "First floor plumbing and electrical"
Rhino.SetLayerUserText "Second Floor", "Description", "Second floor plumbing and electrical"