CopySurface(src, dest, left, right, top bottom)

Can somebody tell me what this undocumented command is for?

CopySurface(src, dest, left, right, top bottom)

(or alike parameters). Seems it's not a mesh surface is it?

Does not seem to be highlighted here. Are you sure it is not a user library function?

It is from Tom's dx7 library but I don't have any idea how CopySurface works.

CopySurface is for rendering to a texture.

I had a search and this is the relevant thread.

render2texture & DDS CopySurface:
http://www.blitzbasic.com/Community/posts.php?topic=62050

Also, another of Tom's dx7 extensions.

Bump Mapping demo & source:
http://www.blitzbasic.com/Community/posts.php?topic=62128

Ok, I see, thanks!

I forgot all about this thing.

Someone knock something up and post it - I'm far too busy playing Company of Heroes.