private void ShowGridPreview(DevExpress.XtraGrid.GridControl grid) {
   // Check whether the Grid Control can be previewed.
   if(!grid.IsPrintingAvailable) {
      MessageBox.Show("The 'DevExpress.XtraPrinting' Library is not found", "Error");
      return;
   }
   // Opens the Preview window.
   grid.ShowPreview();
}

Sub ShowGridPreview(ByVal grid As DevExpress.XtraGrid.GridControl)
   ' Check whether the Grid Control can be previewed.
   If Not grid.IsPrintingAvailable Then
      MessageBox.Show("The 'DevExpress.XtraPrinting' Library is not found", "Error")
      Return
   End If
   ' Opens the Preview window.
   grid.ShowPreview()
End Sub