Using GetHashCode for getting Enum int value

I have an enum

public enum INFLOW_SEARCH_ON
{
  ON_ENTITY_HANDLE = 0,         
  ON_LABEL = 1,                 
  ON_NODE_HANDLE = 2            
} // enum INFLOW_SEARCH_ON

I have to use this enum for searching in a grid column.

To get the column index I am using

  MyEnumVariable.GetHashCode() 

Which works ok, or should I use

  (short)MyEnumVariable

I am a bit confused over using GetHashCode(). Is there any problem using that?