... in respect of nSerialHd() This is the code I used for testing nSerialHd(). #include "fivewin.ch" FUNCTION Main() LOCAL cSerialNos := "", cDrive, n, nSerial, aDrives cSerialNos += "Default Drive Serial No."+STR(nSerialHD())+CRLF+CRLF aDrives := aDrives() FOR n = 1 TO LEN(aDrives) cDrive ...