C#

// Majority of this is a merger of UtilityLibrary and google groups examples
public class MyListView : ListView 
{
	private struct MEASUREITEMSTRUCT 
	{
		public int CtlType;
		public int CtlID;
		public int itemID;
		public int itemWidth;
		public int itemHeight;
		public IntPtr itemData;
	}

	[StructLayout(LayoutKind.Sequential)]
		private struct RECT
	{
		public int left;
		public int top;
		public int right;
		public int bottom;
	}

	private struct DrawItemStruct
	{
		public int ctlType;
		public int ctlID;
		public int itemID;
		public int itemAction;
		public int itemState;
		public IntPtr hWndItem;
		public IntPtr hDC;
		public RECT  rcItem;
		public IntPtr itemData;
	}

	private enum ReflectedMessages
	{
		OCM__BASE = (0x0400 + 0x1c00),
		OCM_DRAWITEM = (OCM__BASE + 0x002B),
	}

	public event System.Windows.Forms.DrawItemEventHandler DrawItem;
	public event MeasureItemEventHandler MeasureItem;
	public const int LVS_OWNERDRAWFIXED      = 0x0400;
	private DrawMode drawMode;
	
	public MyListView()
	{
		this.drawMode = DrawMode.Normal;
	}
	
	protected override CreateParams CreateParams
	{
		get
		{
			CreateParams cp = base.CreateParams;
			cp.Style |= (drawMode != DrawMode.Normal) ? LVS_OWNERDRAWFIXED : 0;
			return cp;
		}
	}
	
	public virtual DrawMode DrawMode
	{
		get { return drawMode; }
		set { drawMode = value; }
	}
	
	protected virtual void OnDrawItem(System.Windows.Forms.DrawItemEventArgs e)
	{
		
	}

	public virtual void OnMeasureItem(MeasureItemEventArgs e)
	{

	}
	
	protected override void WndProc(ref System.Windows.Forms.Message m)
	{
		base.WndProc(ref m);
		
		switch (m.Msg)
		{
			case (int)ReflectedMessages.OCM_DRAWITEM:
			{
				DrawItemStruct dis =
				(DrawItemStruct)m.GetLParam(typeof(DrawItemStruct));
				
				Graphics graph = Graphics.FromHdc(dis.hDC);
				Rectangle rect = new Rectangle(dis.rcItem.left,dis.rcItem.top,dis.rcItem.right - dis.rcItem.left,dis.rcItem.bottom - dis.rcItem.top);
				int index = dis.itemID;
				DrawItemState state = DrawItemState.None;
				
				System.Windows.Forms.DrawItemEventArgs e = new System.Windows.Forms.DrawItemEventArgs(graph, Font, rect, index, state, ForeColor, BackColor);
				if ( this.DrawItem != null )
				{
					this.DrawItem(this,e);
				}
				OnDrawItem(e);
				
				graph.Dispose();
				break;
			}

			case 8236:
				this.WmReflectMeasureItem(ref m);
				break;
				
		}
	}

	private void WmReflectMeasureItem(ref Message m)
	{
		Graphics graphics1;
		MeasureItemEventArgs args1;
		MEASUREITEMSTRUCT measureitemstruct1 = (MEASUREITEMSTRUCT) m.GetLParam( typeof(MEASUREITEMSTRUCT) );
		if ((this.drawMode == DrawMode.OwnerDrawVariable) && (measureitemstruct1.itemID >= 0))
		{
			graphics1 = Graphics.FromHwnd(this.Handle);
			args1 = new MeasureItemEventArgs(graphics1, measureitemstruct1.itemID, 20);
			try
			{
				if ( this.MeasureItem != null )
				{
					this.MeasureItem(this,args1);
				}
				this.OnMeasureItem(args1);
				measureitemstruct1.itemHeight = args1.ItemHeight;
			}
			finally
			{
				graphics1.Dispose();
			}
		}

		measureitemstruct1.itemHeight = 20;//this.ItemHeight;
		Marshal.StructureToPtr(measureitemstruct1, m.LParam, false);
		m.Result = ((IntPtr) 1);
	}
}

<br />
Certificate c;<br />
ICertificateStatus status = c.isValid();<br />
status.CheckFlag = CAPICOM.CAPICOM_CHECK_FLAG.CAPICOM_CHECK_TRUSTED_ROOT;<br />
/**<br />
**/<br />
status.CheckFlag = CAPICOM.CAPICOM_CHECK_FLAG.CAPICOM_CHECK_ONLINE_REVOCATION_STATUS;<br />
/**<br />
**/<br />