dropdown in dynamic alv

Hi,

I have created one dynamic alv in webdynpro abap.

Now I have to put drop down in some of its columns.

Can anyone help in creating drop down in dynamic alv column?

If the alv is static we can create an attribute of type WDR_CONTEXT_ATTR_VALUE_LIST inside the alv node. and populate it with required values but here the alv is dynamic and so the context node.

So how can we achieve the same functionality for dynamic alv.

Regard's,

Puneet