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;