HI,

I've just downloaded your extension and pretty cool it is, if it worked....

Fortunately you uploaded the source code and I was able to resolve why my shapefile was not exporting to KML.

You declare absheight as a SINGLE but my contour data is in DOUBLE. Also what is a real show stopper is that my data is a graduated colour scheme. Your code sets pRenderer as IUniqueValueRenderer so it bombs out.

I'm a BIG fan of tool tips and I think this extension could be enhanced with these, so the user has much better idea of what the controls actually set.

Anyway after I worked out why it was not exporting I set the data to unique categories and it worked a treat,see attached image, very cool!

Duncan