>> Just as you wonder about "Handheld", I can't help questioning why "windows development" wasn't included as a separate category. <<

It was. The chart Evan posted was for database developers. Another chart in the same survey/article lists average salaries by primary language used:

C# $73,139
VB.NET 68,322
VB 4,5, or 6 66,259
VC++ 6 74,818

Apparently that chart only considers Visual Studio tools, since the last time I checked VFP, Delphi, and Access were still Windows development tools.