The UIApplication type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | ActiveAddInId | Get current active external application or external command id. |
| ActiveUIDocument | Provides access to an object that represents the currently active project. |
| Application | Returns the database level Application represented by this UI level Application. |
| DrawingAreaExtents | Get the rectangle that represents the screen pixel coordinates of drawing area. |
| IsValidObject | Specifies whether the .NET object represents a valid Revit entity. |
| IsViewerModeActive | Determines if Revit session is in Viewer mode. |
| LoadedApplications | Returns an array of successfully loaded external applications. |
| MainWindowExtents | Get the rectangle that represents the screen pixel coordinates of the Revit main window. |
| MainWindowHandle | Get the handle of the Revit main window. |
| ProductIsRS | Identifies if the current Revit product has an RS designation. Most add-ins will not need to use this information. |