急，请问如何获取USB设备的路径，非HID类型

请问我该如何在程序中实现，请给出实现方法与思路；
或者给出VB源程序，解决立即给分。

万分感谢！

ClassGuid = GUID_CLASS_USB_DEVICE

SetupDiGetClassDevs(ClassGuid,
                   nil,
                   0,
                   DIGCF_PRESENT or DIGCF_DEVICEINTERFACE );
SetupDiEnumDeviceInfo
SetupDiGetDeviceRegistryProperty
SetupDiDestroyDeviceInfoList

MSDN

用这个函数试试

// GetDeviceViaInterface: Open a handle via a device interface

HANDLE GetDeviceViaInterface( GUID* pGuid, DWORD instance)
{
// Get handle to relevant device information set
HDEVINFO info = SetupDiGetClassDevs(pGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_INTERFACEDEVICE);

if(info==INVALID_HANDLE_VALUE)
{
printf(\"No HDEVINFO available for this GUID\\n\");
return NULL;
}

// Get interface data for the requested instance
SP_INTERFACE_DEVICE_DATA ifdata;
ifdata.cbSize = sizeof(ifdata);
if(!SetupDiEnumDeviceInterfaces(info, NULL, pGuid, instance, &ifdata))
{
printf(\"No SP_INTERFACE_DEVICE_DATA available for this GUID instance\\n\");
SetupDiDestroyDeviceInfoList(info);
return NULL;
}
// Get size of symbolic link name

DWORD ReqLen;
SetupDiGetDeviceInterfaceDetail(info, &ifdata, NULL, 0, &ReqLen, NULL);
PSP_INTERFACE_DEVICE_DETAIL_DATA ifDetail = (PSP_INTERFACE_DEVICE_DETAIL_DATA)(new char[ReqLen]);
if( ifDetail==NULL)
{
return NULL;
}
// Get symbolic link name
ifDetail->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA);
if( !SetupDiGetDeviceInterfaceDetail(info, &ifdata, ifDetail, ReqLen, NULL, NULL))
{
SetupDiDestroyDeviceInfoList(info);
delete ifDetail;
return NULL;
}
printf(\"Symbolic link is %s\\n\",ifDetail->DevicePath);
// Open file and pipe

HANDLE rv = CreateFile(ifDetail->DevicePath,
GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
if( rv==INVALID_HANDLE_VALUE) rv = NULL;

delete ifDetail;
SetupDiDestroyDeviceInfoList(info);
return rv;
}

那么请问这个USB设备的GUID如何获得呢？
是不是每个GUID标志一个USB设备呢？
USB设备不同，GUID也一定不同，这样判断对不对？

请高手进来回答，谢谢！

GUID在设备的驱动程序的inf文件中可以找到，不同累得USB设备有不同的GUID，你可以找相关的书查一下