Antonio, I found the problem, but I still don't know the solution. I had created the ACE32.LIB as you showed me, but the ACE32.DLL was still in the same directory as my test code. When I compiled the test code under Harbour it ran OK. But when I compiled under xHarbour I got ...
... the serialnr of the HardDisk. Up till now I did't have a problem on networks (only on Windows98 workstations together win XP). The workstation showed the number of the HD of the server. Now I have a custom that using Windows2000 & Windows2003 server together with WindowsXP SP1 workstations. ...