DWF markups / blocks

I am trying to develop some kind of web page where the visitor can add some data to a DWF file, a line etc.

I know I most likely need to use the toolkit, but any suggestions how I could go about this.

Will the next version of the viewer allow markups and if so, will there be the ability to create a cutom markup and add it. If not again, any ideas how this may be achievable? The finial aim if for the visitor to be able to add a block with some data associated with it that saves back to the dwf on the server.

Any ideas or suggestions would be much appreciated

Thanks..

If you have not found one available yet, autodwg viewX is a choise, Im using it, http://www.autodwg.com/dwg-viewer/dwgviewx.htm.

Markups can be made and saved, just meet your demand. We could looking up attributes in blocks using the activex but can't do further designing. If we can add blocks with attributes it will be glad to hear that.