Finding how many PCI slots are on system

[entropy01]

Hi guys, I'm trying to create code to determine how many PCI slots are currently on a system...available and used.

I have been trying to use the Win32_SystemSlot WMI class but it doesnt seem to be working properly.

//query systemslot
IEnumWbemClassObject* pEnumerator = NULL;
    hres = pSvc->ExecQuery(
        bstr_t("WQL"), 
        bstr_t("SELECT * FROM Win32_SystemSlot"),
        WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, 
        NULL,
        &pEnumerator);
//get class object
	IWbemClassObject *pclsObj;
    ULONG uReturn = 0;
    	int noPCI = 0;
		int noAGP = 0;
		int noPCMIA = 0;
//loop through system slots
    while (pEnumerator)
    {
        //next object
        HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, 
            &pclsObj, &uReturn);
		
        VARIANT vtProp;
		//get connecter type data (unsigned int16 array)
 		hr = pclsObj->Get(L"ConnectorType", 0, &vtProp, 0, 0);
                
                //create uint16 array to store data
		unsigned short aShort[sizeof(vtProp)];
		memcpy (aShort, (char*)(&vtProp), sizeof(aShort));
		for(int i=0; i<sizeof(aShort); i++)
		cout << aShort[i] << endl;

        VariantClear(&vtProp);

instead of outputting useful shorts containing data according to this table http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx (scroll down to connector type) it gives me instead the output:

8195 | -13364 | -13364 | -13364 | -5808 | 22 | -13364 | -13364 |
8195 | -13364 | -13364 | -13364 | -5808 | 22 | -13364 | -13364 |
8195 | -13364 | -13364 | -13364 | -5808 | 22 | -13364 | -13364 |

Which is the output for each iteration through the three system slots it loops through.

PCI slots should come up as 99. Any idea what i'm doing wrong?

[Codeplug]

You access a variant array using the safe-array COM API.
http://msdn.microsoft.com/en-us/library/ms221145.aspx

Use "SAFEARRAY *psa = V_ARRAY(&vProp);" to get the handle to the safe-array.

gg