Revit 2025.3 API
UIApplication Class |
Represents an active session of the Autodesk Revit user interface, providing access to
UI customization methods, events, the main window, and the active document.
Inheritance HierarchyNamespace: Autodesk.Revit.UI
Assembly: RevitAPIUI (in RevitAPIUI.dll) Version: 25.3.0.0 (25.3.0.0)
Syntax
The UIApplication type exposes the following members.
Constructors| Name | Description | |
|---|---|---|
 | UIApplication | Use a database level Application to construct a UI-level Application. |
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. |
Methods| Name | Description | |
|---|---|---|
| CanPostCommand | Identifies if the given command can be posted, using PostCommand(RevitCommandId). |
| CreateAddInCommandBinding | Creates a new AddInCommandBinding. |
| CreateRibbonPanel(String) | Create a new RibbonPanel on the Add-Ins tab. |
| CreateRibbonPanel(String, String) | Create a new RibbonPanel on the specified tab. |
| CreateRibbonPanel(Tab, String) | Create a new RibbonPanel on the designated standard Revit tab. |
| CreateRibbonTab | Creates a new tab on the Revit user interface. |
| Dispose | Releases all resources used by the UIApplication |
 | DoDragDrop(ICollectionString) | |
| DoDragDrop(Object, IDropHandler) | Initiates a drag and drop operation with a custom drop implementation. |
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object) |
| GetDockablePane | Gets a DockablePane object by its ID. |
| GetHashCode | Serves as the default hash function. (Inherited from Object) |
| GetRibbonPanels | Get all the custom Panels on Add-Ins tab of Revit. |
| GetRibbonPanels(String) | Get all the custom Panels on a designated Revit tab. |
| GetRibbonPanels(Tab) | Get all the custom Panels on a designated standard Revit tab. |
| GetType | Gets the Type of the current instance. (Inherited from Object) |
| LoadAddIn | Loads add-ins from the given manifest file. |
| LoadPackageContents | Loads add-ins from the given packageContents.xml file. |
| OpenAndActivateDocument(String) | Opens and activates a Revit document. |
| OpenAndActivateDocument(ModelPath, OpenOptions, Boolean) | Opens and activates a Revit document, include both local document or cloud document. |
| OpenAndActivateDocument(ModelPath, OpenOptions, Boolean, IOpenFromCloudCallback) | Opens and activates a Revit document, include both local document or cloud document. |
| PostCommand | Posts the command to the Revit message queue to be invoked when control returns from the current API context. |
| RegisterContextMenu | Adds a new context menu creator. |
| RegisterDockablePane | Adds a new dockable pane to the Revit user interface. |
| RemoveAddInCommandBinding | Removes an AddInCommandBinding. |
| ToString | Returns a string that represents the current object. (Inherited from Object) |
Events| Name | Description | |
|---|---|---|
 | ApplicationClosing | Subscribe to the ApplicationClosing event to be notified when the Revit application is just about to be closed. |
| DialogBoxShowing | Subscribe to the DialogBoxShowing event to be notified when Revit is just about to show a dialog box or a message box. |
| DisplayingOptionsDialog | Subscribe to the options dialog displaying event to be notified when Revit options dialog is displaying. |
| DockableFrameFocusChanged | Subscribe to this event to be notified when a Revit GenericDockableFrame has gained focus or lost focus in the Revit user interface. This event is called only for API-created GenericDockableFrames. |
| DockableFrameVisibilityChanged | Subscribe to this event to be notified when a Revit GenericDockableFrame has been shown or hidden in the Revit user interface. This event is called only for API-created GenericDockableFrames. |
| ExternalDataManagerChanged | Subscribe to ExternalDataManager changed event to be notified. |
| FabricationPartBrowserChanged | Subscribe to MEP Fabrication part browser changed event to be notified when MEP Fabrication part browser is updated. |
| FormulaEditing | Subscribe to the FormulaEditing event to be notified when the edit formula button has been clicked. |
| Idling | Subscribe to the Idling event to be notified when Revit is not in an active tool or transaction. |
| MacroUpdated | MacroUpdated. |
| SelectionChanged | Subscribe to the SelectionChanged event to be notified after the selection was changed. |
| ThemeChanged | Subscribe to the ThemeChanged event to be notified after the theme was changed. |
| TransferredProjectStandards | Subscribe to the TransferredProjectStandards event to be notified after the scope of a Transfer Project Standards operation has been finalized. |
| TransferringProjectStandards | Subscribe to the TransferringProjectStandards event to be notified before the scope of an impending Transfer Project Standards operation has been finalized in the Transfer Project Standards dialog. |
| ViewActivated | Subscribe to the ViewActivated event to be notified immediately after Revit has finished activating a view of a document. |
| ViewActivating | Subscribe to the ViewActivating event to be notified when Revit is just about to activate a view of a document. |
Remarks
You can access documents from the database level Application object, obtained from
the Application property. If you have an instance of the database level Application object,
you can construct a UIApplication instance from it.
See Also