Sorry for the delay on response. I was working very
hard on finish some software until last week and I
forgote to answer this issue.
I'm posting the path for the problem of WINVER macro in
file wingdi.h on w32api, what I mensioned in Bugs item
#1420775. I added the macros _WIN32_WINDOWS and
_WIN32_WINNT in the #if #endif, block of functions
AlphaBlend(), GradientFill() and TransparentBlt(). So
targeting Windows 98 or Windows 2000 make this
functions available. I have to say that dealing with
this macros while making software is very confusing.
Even Microsoft says that, "A feature that is not part
of a initial release of a Operating System may be
available through adicional paths or service packs".
I'm posting the file changed in GZIP format.