Revit 2025 API
IExternal |
Implement this method to execute some tasks when Autodesk Revit starts.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 25.0.0.0 (25.0.0.0)
Syntax
ExternalDBApplicationResult OnStartup( ControlledApplication application )
Function OnStartup ( application As ControlledApplication ) As ExternalDBApplicationResult
ExternalDBApplicationResult OnStartup( ControlledApplication^ application )
abstract OnStartup : application : ControlledApplication -> ExternalDBApplicationResult
Parameters
- application ControlledApplication
- Handle to the Revit Application object.
Return Value
ExternalDBApplicationResultIndicates if the external db application completes its work successfully.

Typically, event handlers and updaters are registered in this method.
See Also