Win32 api with 2.061

[cal]

I am trying to compile a project using the Win32 api header's 
(the Dsource ones) with 2.061 and am getting errors for the first 
time with things like this:

const uint WINVER = blah
Error: variable WINVER cannot be read at compile time.
I just want to confirm if this is due to a change in the 
compiler? I didn't see this error with earlier releases.

Cheers,
cal