Thanks, I have managed to install the API.pm. Still I get a shout that the perl, find the FILE, but has a problem with the object! Do you have any idea how to solve this problem. ...... Can't locate loadable object for module Win32::API in @INC (@INC contains: . .\t .\lib ..\lib C:\Perl\site\lib\Win32 C:\Perl\site\lib\Win32API C:/Perl/lib C:/Perl/site/lib) at ..\lib/Win32API/CommPort.pm line 5 ......