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|  | **Primary** | **&RelationManager** |

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The **Primary **property is a reference to the RelationManager object for the WindowManager's primary file. The WindowManager uses this property to carry out inserts, changes and deletes.

**Implementation:**

The WindowManagerClass does not initialize the Primary property. Your derived Init method should initialize the Primary property if the procedure does database updates. See the [[windowmanager overview.htm#egi1 oy|Conceptual Example]].