text: The members of**DocExComment_ExternalHyperlink(Rctfv)**structure are as follows: 
  
  **ident**Specifies the constant value, msodocexsignature, which identifies this EMF 
  
  comment as containing semantic information. 
  
  **iComment**Specifies the MSODOCEXCOMMENT value, 
  
  msodocexcommentExternalHyperlink or msodocexcommentExternalHyperlinkRctfv. 
  
  **rcdvRegion**and**rctfvRegion**A union that specifies the region of the page that is 
  
  the source location of the hyperlink. The region can be represented as a RECT type 
  
  (rcdvRegion) that uses device pixels as the unit of measure, or as a structure that 
  
  contains floating-point coordinates (rctfvRegion), in which case the unit of 
  
  measure is points. 
  
  If the**iComment**member is equal to msodocexcommentExternalHyperlink, the 
  
  add-in should use**rcdvRegion**. In this case, the add-in needs to apply the current 
  
  EMF transformation matrix to**rcdvRegion**to convert it to the page space. 
  
  If the**iComment**member is equal to msodocexcommentExternalHyperlinkRctfv, 
  
  the add-in should use**rctfvRegion**. In this case,**rctfvRegion**is already in the page 
  
  space, so no transformation is needed. 