Friday, HA! I copy and paste my test code but change variable names (m1 = lnLastE) :-)

>Also, I don't have m1 defined and formatmessage() doesn't exist for me so I error on those...
>
>
>SNIP
>>
>>What is the result of this? Here it geves me "The handle is invalid"
>>

>>? SetupDiEnumDeviceInterfaces(m.lnDeviceInfoSet, ;
>>    @m.lcDeviceInfoData, ;
>>    @m.lcClassGuid, ;
>>    m.lnx,;
>>    @m.lcDeviceInterfaceData)
>>
>>lnLastE = GetLastError()
>>? m1
>>lcBuffer = SPACE(512)
>>FormatMessage(0x1000, 0, lnLastE, 0, @lcBuffer,512,0)
>>? lcBuffer
>>