获取操作系统版本

Function GetWindowsVersion: String;
var
AWin32Version: Extended;
os:string;
begin
os:='Windows ';
AWin32Version := StrtoFloat(format('%d.%d' ,[Win32MajorVersion, Win32MinorVersion]));
if Win32Platform=VER_PLATFORM_WIN32s then
Result := os + '32'
else if Win32Platform=VER_PLATFORM_WIN32_WINDOWS then
begin
if AWin32Version=4.0 then
Result := os + '95'
else if AWin32Version=4.1 then
Result := os + '98'
else if AWin32Version=4.9 then
Result := os + 'Me'
else
Result := os + '9x'
end
else if Win32Platform = VER_PLATFORM_WIN32_NT then
begin
if AWin32Version=3.51 then
Result := os + 'NT 3.51'
else if AWin32Version=4.0 then
Result := os + 'NT 4.0'
else if AWin32Version=5.0 then
Result := os + '2000'
else if AWin32Version=5.1 then
Result := os + 'XP'
else if AWin32Version=5.2 then
Result := os + 'Server 2003'
else if AWin32Version=6.0 then
Result := os + 'Vista'
else if AWin32Version=6.1 then
Result := os + '7'
else
Result := os ;
end
else
Result := os + 'Unknown';
end;