Validates that input contains one or more form elements or geom combinations containing form elements. 
   Namespace:   Autodesk.Revit.DB  
  Assembly:   RevitAPI  (in RevitAPI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Parameters
- ADoc
-  Type:  Autodesk.Revit.DB Document  
 The document.
- elements
-  Type:  System.Collections.Generic ICollection   ElementId  
 A collection of elements.
Return Value
True if inputs contain one or more form elements. Non-form element inputs are ignored. False if none of the inputs are form elements or do not contain form elements.Exceptions
| Exception | Condition | 
|---|---|
| Autodesk.Revit.Exceptions ArgumentNullException | A non-optional argument was NULL |