An object that represents a simple message box that prompts the user for some action. 
   Namespace:   Autodesk.Revit.UI.Events  
  Assembly:   RevitAPIUI  (in RevitAPIUI.dll) Version: 2015.0.0.0 (2015.0.0.0) 
Syntax
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Remarks
 When the application receives this object, a simple message box is displayed in Revit that requires user interaction. The OverrideResult function can be used to cause the dialog to be dismissed and return a desired result code. 
 Inheritance Hierarchy
  System Object  
Autodesk.Revit.DB APIObject
Autodesk.Revit.UI.Events DialogBoxData
Autodesk.Revit.UI.Events MessageBoxData
 
 Autodesk.Revit.DB APIObject
Autodesk.Revit.UI.Events DialogBoxData
Autodesk.Revit.UI.Events MessageBoxData