Obtains the transform for the door or window instance. 
   Namespace:   Autodesk.Revit.DB.IFC  
  Assembly:   RevitAPIIFC  (in RevitAPIIFC.dll) Version: 2015.0.0.0 (2015.0.0.0) 
  Since:  2014 
Syntax
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Parameters
- familyInstance
 -  Type:  Autodesk.Revit.DB FamilyInstance  
The family instance. 
- familySymbol
 -  Type:  Autodesk.Revit.DB FamilySymbol  
The family symbol. 
- flippedX
 -  Type:  System Boolean  
Is the door or window flipped in X? 
- flippedY
 -  Type:  System Boolean  
Is the door or window flipped in Y? 
Return Value
The transform.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |