type
TOSVersion = (osUnknown, os95, os98, osME, osNT3, osNT4, os2K, osXP);
function GetOS: TOSVersion;
var
OS: TOSVersionInfo;
begin
ZeroMemory(@OS,SizeOf(OS));
OS.dwOSVersionInfoSize := SizeOf(OS);
GetVersionEx(OS);
Result := osUnknown;
if OS.dwPlatformId = VER_PLATFORM_WIN32_NT then
begin
case OS.dwMajorVersion of
3: Result := osNT3;
4: Result := osNT4;
5:
begin
case OS.dwMinorVersion of
0: Result:= os2K;
1: Result:= osXP;
end;
end;
end;
end
else if (OS.dwMajorVersion = 4) and (OS.dwMinorVersion = 0) then
Result := os95
else if (OS.dwMajorVersion = 4) and (OS.dwMinorVersion = 10) then
Result := os98
else if (OS.dwMajorVersion = 4) and (OS.dwMinorVersion = 90) then
Result := osME
end;