Hi Tracy,

HDEVINFO is defined as PVOID, PVOID is defined as void* PVOID. That makes it a pointer to void. I found it out searching HDEVINFO here: http://www.reactos.org/generated/doxygen/search.php?query=HDEVINFO

I'd say try it with LONG instead of INTEGER then.

DECLARE LONG SetupDiGetClassDevs IN setupapi.dll ;
    STRING @cGuid, ;
    STRING Enumerator, ;
    INTEGER hwndParent, ;
    INTEGER nFlags

...

DECLARE INTEGER SetupDiEnumDeviceInterfaces IN setupapi;
	LONG DeviceInfoSet,;
	STRING @ DeviceInfoData,;
	STRING @ ByRefterfaceClassGuid,;
	INTEGER MemberIndex,;
	STRING @ DeviceInterfaceData

Help on Declare-DLL says it's both 32 bit, but LONG is 32bit long integer, I think they meant LONG is unsigned. That may help, didn't check it out though.

Bye, Olaf.