text: The*idNodeParent*parameter specifies the ID of the node that is the parent of the node 
  
  being passed to the add-in. If this parameter is**0**, the node is located under the root of 
  
  the document-structure tree. Multiple sibling nodes may be located under the root. If 
  
  this parameter is**-1**, the node is located under the currently open node, that is, under 
  
  the last node specified by**HrBeginStructNode**that has not been closed by a call to 
  
  **HrEndStructNode**. 
  
  The*iSortOrder*parameter specifies the sort order of the structure node among its 
  
  siblings. No two nodes can have the same sort order. However, the set of integers that 
  
  constitute the sort order need not be contiguous. A value of**-1**indicates that the sibling 
  
  sort order is the same order in which the nodes appear in the EMF comments. 
  
  The*pnode*parameter points to an**MSODOCEXSTRUCTNODE**structure, which has the 
  
  following declaration: 