Workbench User Guide : 14. Adding Other Components to Your Application : Ghost Frames
 
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Ghost Frames
Ghost frames are used to manage and coordinate applications without user interaction. Ghost frames differ from other OpenROAD user frames in that they do not contain forms (thus making them invisible to the user). However, you can use ghost frames like regular user frames in the following ways:
You can call ghost frames from other frames and procedures.
Ghost frames can send and receive user events.
Ghost frames also differ from 4GL procedures in that they can receive and execute user and database events. Ghost frames are useful for handling operations that run continuously without requiring user intervention.
For more information about ghost frames, see How You Can Create Non-interactive Applications.