C#

using System;<br />
	using System.CodeDom;<br />
	using System.ComponentModel;<br />
	using System.ComponentModel.Design;<br />
	using System.ComponentModel.Design.Serialization;<br />
	using System.Drawing;<br />
	using System.Windows.Forms;<br />
 <br />
	namespace WindowsApplication17<br />
	{<br />
		internal class MyCodeDomSerializer : CodeDomSerializer <br />
		{<br />
			public override object Deserialize(IDesignerSerializationManager manager, object codeObject) <br />
			{<br />
				// This is how we associate the component with the serializer.<br />
				CodeDomSerializer baseClassSerializer = (CodeDomSerializer)manager.<br />
					GetSerializer(typeof(MyComponent).BaseType, typeof(CodeDomSerializer));<br />
<br />
				/* This is the simplest case, in which the class just calls the base class<br />
					to do the work. */<br />
				return baseClassSerializer.Deserialize(manager, codeObject);<br />
			}<br />
 <br />
			public override object Serialize(IDesignerSerializationManager manager, object value) <br />
			{<br />
				/* Associate the component with the serializer in the same manner as with<br />
					Deserialize */<br />
				CodeDomSerializer baseClassSerializer = (CodeDomSerializer)manager.<br />
					GetSerializer(typeof(MyComponent).BaseType, typeof(CodeDomSerializer));<br />
 <br />
				object codeObject = baseClassSerializer.Serialize(manager, value);<br />
 <br />
				/* Anything could be in the codeObject.  This sample operates on a<br />
					CodeStatementCollection. */<br />
				if (codeObject is CodeStatementCollection) <br />
				{<br />
					CodeStatementCollection statements = (CodeStatementCollection)codeObject;<br />
 <br />
					// The code statement collection is valid, so add a comment.<br />
					string commentText = "This comment was added to this object by a custom serializer.";<br />
					CodeCommentStatement comment = new CodeCommentStatement(commentText);<br />
					statements.Insert(0, comment);<br />
				}<br />
				return codeObject;<br />
			}<br />
		}<br />
 <br />
		[DesignerSerializer(typeof(MyCodeDomSerializer), typeof(CodeDomSerializer))]<br />
		public class MyComponent : Component <br />
		{<br />
			private string localProperty = "Component Property Value";<br />
			public string LocalProperty <br />
			{<br />
				get <br />
				{<br />
					return localProperty;<br />
				}<br />
				set <br />
				{<br />
					localProperty = value;<br />
				}<br />
			}<br />
		}<br />
<br />
	}

#pragma warning (disable: 4278)<br />
#import <mscorlib.tlb> raw_interfaces_only<br />
#import "Checker.tlb" no_namespace named_guids<br />
<br />
int Check(long param)<br />
{<br />
    ICheck *check = NULL;<br />
<br />
    HRESULT hr = CoCreateInstance(<br />
        CLSID_Check,<br />
        NULL, <br />
        CLSCTX_INPROC_SERVER,<br />
        IID_ICheck, <br />
        reinterpret_cast<void**>(&check));<br />
<br />
    // I get the error here<br />
    if (FAILED(hr)) <br />
        return false;<br />
<br />
    int result = check->Check(param);<br />
<br />
    check->Release();<br />
<br />
    return result;<br />
}

    [Guid("E726B4A3-5536-4f06-9554-A57526B27D92")]<br />
    public interface ICheck<br />
    {<br />
        int Check(int param);<br />
    }<br />
<br />
    [Guid("47339B99-97BB-4148-BAA4-A793295ABA38")]<br />
    public class Check : ICheck<br />
    {<br />
        int Check(int param)<br />
        {<br />
            int result = 0;<br />
            // Do some tests with param and update result<br />
            <br />
            return result;<br />
            <br />
        }<br />
    }