>>147
いつの間にかAPIの説明からこれが消えてるなー

Platform            High order bit   Low order byte (major version number)
Windows NT          zero           3 or 4
Windows 95             1              4
Win32s with Windows 3.1   1              3

For Windows NT and Win32s, the remaining bits in the high order word specify the build number.
For Windows 95 the remaining bits of the high order word are reserved.