プレビューのフォームのLoad時にイベントを関連付ける。
Private Sub fmReportViewer_Load(sender As Object, e As EventArgs) Handles Me.Load AddHandler rpt.Document.Printer.EndPrint, AddressOf onEndPrint rpt.Run(False) Me.Viewer1.Document = rpt.Document End Sub Private Sub onEndPrint(ByVal sender As Object, ByVal e As System.Drawing.Printing.PrintEventArgs) MessageBox.Show("印刷完了") End Sub