Omid's answer is correct, but you have to make sure to do that stuff after you have set the viewer's ReportSource. The version in my function below is a little more robust, and makes what's going on a little clearer, though I'm still not sure why doing that bit of magic to the TabControl's ItemSize and SizeMode make the tab bar go away.
// This is a method of a Form with one of these: // CrystalDecisions.Windows.Forms.CrystalReportViewer // This hides the tab control with the "Main Report" button. public void hideTheTabControl() < System.Diagnostics.Debug.Assert( crystalReportViewer1.ReportSource != null, "you have to set the ReportSource first"); foreach (Control c1 in crystalReportViewer1.Controls) < if (c1 is CrystalDecisions.Windows.Forms.PageView) < PageView pv = (PageView)c1; foreach (Control c2 in pv.Controls) < if (c2 is TabControl) < TabControl tc = (TabControl)c2; tc.ItemSize = new Size(0, 1); tc.SizeMode = TabSizeMode.Fixed; >> > > >