Get the id of the RebarHookType to be applied to the rebar. 
   Namespace:   Autodesk.Revit.DB.Structure  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2013 
Syntax
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Parameters
- end
-  Type:  System Int32  
 0 for the start hook, 1 for the end hook.
Return Value
The id of a RebarHookType, or invalidElementId if the rebar has no hook at the specified end.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentOutOfRangeException | end must be 0 or 1. |