ZForge.Controls.HeaderPanelNativeMethods.RedrawWindow C# (CSharp) Method

        public static extern bool RedrawWindow(IntPtr hWnd, IntPtr rectUpdate, IntPtr hrgnUpdate, uint flags);

 protected override void OnResize(EventArgs e)
 {
     base.OnResize(e);
     // Invalidate none client area
     HeaderPanelNativeMethods.RedrawWindow(this.Handle, IntPtr.Zero, IntPtr.Zero,
                                           0x0400 /*RDW_FRAME*/ | 0x0100 /*RDW_UPDATENOW*/ | 0x0001 /*RDW_INVALIDATE*/);
 }