COM running object table utility class

RotHelper.cs

/// <summary>
/// COM running object table utility class
/// </summary>
public static class ROTHelper
{
	public static IDictionary<string, object> GetActiveObjects(string MonikerFilter)
	{
		var ret = new Dictionary<string, object>();

		IRunningObjectTable pprot;   
		IEnumMoniker ppenumMoniker;
		IMoniker[] monikers = new IMoniker[1];

		Win32.GetRunningObjectTable(0, out pprot);    
		pprot.EnumRunning(out ppenumMoniker);
		ppenumMoniker.Reset();          

		while (ppenumMoniker.Next(1, monikers, IntPtr.Zero) == 0)
		{     
			IBindCtx ctx;
			Win32.CreateBindCtx(0, out ctx);     
		
			string name;
			monikers[0].GetDisplayName(ctx, null, out name);

			if (string.IsNullOrWhiteSpace(MonikerFilter) || (name.IndexOf( MonikerFilter ) != -1))
			{
				object val;
				pprot.GetObject(monikers[0], out val); 
				ret.Add(name, val);
			}
		} 
		return ret;
	}
}

public static class Win32
{
	/// <summary>
	/// Returns a pointer to an implementation of IBindCtx (a bind context object).
	/// This object stores information about a particular moniker-binding operation.
	/// </summary>
	/// <param name="reserved">This parameter is reserved and must be 0.</param>
	/// <param name="ppbc">Address of an IBindCtx* pointer variable that receives
	/// the interface pointer to the new bind context object. When the function is
	/// successful, the caller is responsible for calling Release on the bind context.
	/// A NULL value for the bind context indicates that an error occurred.</param>
	/// <returns>This function can return the standard return values E_OUTOFMEMORY and S_OK.</returns>
	[DllImport("ole32.dll")]
	public static extern int CreateBindCtx(uint reserved, out IBindCtx ppbc);
	
	/// <summary>
	/// Returns a pointer to the IRunningObjectTable
	/// interface on the local running object table (ROT).
	/// </summary>
	/// <param name="reserved">This parameter is reserved and must be 0.</param>
	/// <param name="prot">The address of an IRunningObjectTable* pointer variable
	/// that receives the interface pointer to the local ROT. When the function is
	/// successful, the caller is responsible for calling Release on the interface
	/// pointer. If an error occurs, *pprot is undefined.</param>
	/// <returns>This function can return the standard return values E_UNEXPECTED and S_OK.</returns>
	[DllImport("ole32.dll")]
	public static extern int GetRunningObjectTable(uint reserved,
	   out System.Runtime.InteropServices.ComTypes.IRunningObjectTable pprot);
	
}