UserControl property
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_Application.UserControl property

True if the application is visible or if it was created or started by the user. False if you created or started the application programmatically by using the CreateObject or GetObject functions and the application is hidden.

Namespace:  Microsoft.Office.Interop.Excel
Assembly:  Microsoft.Office.Interop.Excel (in Microsoft.Office.Interop.Excel.dll)

bool UserControl { get; set; }

Property value

Type: System.Boolean

When the UserControl property is False for an object, that object is released when the last programmatic reference to the object is released. If this property is False, Microsoft Excel quits when the last object in the session is released.

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