How to add property to property map without class explorer?

I've got a new question after answer on this question Pass parameter from page to ActiveX

How to add property to property map without class explorer?

Need to add the property for object and class explorer doesn't work because Nemerle doesn't support it yet.

Code:

<object id="DBTableRepX"
 classid="CLSID:CA8B72B3-3B15-40D7-9364-478E25AF5B41"
 codebase="DBTableRepX.cab"
    style="
    Z-INDEX: 102; LEFT: 20px; WIDTH: 1200px; 
    POSITION: absolute; TOP: 80px; HEIGHT: 600px">
    <param name="ax_Command" value='<%=GetText()%>'/>
</object>开发者_开发知识库;

Why not derive you own ActiveX class from the one you are using and add the property to the derived class?

Or make a wrapper class and use that.