Pues lo anterior lo saque de Delphi 5
Y esto que sigue de Delphi 7, quizás tu estes obteniendo ayuda de las propiedades del objeto TQuickRep y no de los métodos ya que tanto Preview como el resto son métodos.
Cita:
procedure Preview
Use ‘Preview’ to generate the report and bring up an on screen preview of it. From the preview window the user can choose to print the report.
When calling Preview the report is generated without creating a background thread. If you use a database driver that is thread safe you can use PreviewModal or PreviewModeless to bring up true modal or modeless previews. The window created by Preview is not a true Modal window but the program will not continue until the preview is closed.
You can install your own preview dialog instead of the standard preview form provided with QuickReport. For more information see TQRPreview.
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Un Saludo.