I am using an SDK in Visual Studio which uses custom
components for displaying documents. Is there a way that
actionscript/flex can understand this components and render them
when returned by a web service?
C# web service...
public WebThumbnailViewer Example()
WebThumbnailViewer tnv = new WebThumbnailViewer();
You can't. There is some magic approaching this level between
ActionScript and Java, via remoteObject(AMF), using
registerClassAlias(), but nothing like that kind of integration
with .net. Even the AS-Java serialization is just for value objects
and not for full, visual, interactive components.