Designers implement the IActiveDesignerRuntime interface to delay the connection of event sources and sinks, which can improve performance. Designers that implement this interface must set the DESIGNERFEATURE_DELAYEVENTSINKING registry flag and use the host's IActiveDesignerRuntimeSite interface.
IActiveDesignerRuntime contains the following method:
| Method | Description |
| SetSite | Passes the designer a pointer to a run-time site interface through which it can connect event sources and sinks. |