WMI Win32_DiskDrivePhysicalMedia

[dene99970]

Based on articles from this site: http://www.codeproject.com/system/UsingWMI.asp http://www.codeproject.com/system/Using\_WMI\_in\_Visual\_C\_\_.asp I've learned how to get information from a Win32_* class. First step: Service->ExecQuery(L"WQL", L"SELECT * FROM Win32_BaseBoard",WBEM_FLAG_FORWARD_ONLY,NULL, &enumerator); And later second step: obj->Get(L"SerialNumber", 0, &var, 0, 0); However, I don't know how to do it from class Win32_DiskDrivePhysicalMedia. The first step works of course, but I'm not sure how to specify the Antecedent or Dependent. I tried this: hf = obj->Get(L"Antecedent.SerialNumber", 0, &var, 0, 0); But it doesn't work.

[ppnht]

Hello, it took me a while to figure it out how this class works. Here is a sample in Managed C++:

ManagementObjectCollection ^c = query("Win32\_DiskDrivePhysicalMedia");
for each(ManagementObject ^o in c)
{
	DeviceInfo ^device = gcnew DeviceInfo();
	ManagementObject ^media = gcnew ManagementObject(o\["Antecedent"\]->ToString());
	ManagementObject ^disk = gcnew ManagementObject(o\["Dependent"\]->ToString());
	Object ^temp = disk\["Manufacturer"\];
	if(temp) device->manufacturer = temp->ToString();
	temp = disk\["Model"\];
	if(temp) device->model = temp->ToString();
	temp = media\["SerialNumber"\];
	if(temp) device->serial = temp->ToString();
	
	list\_->Add(device);
}

The class Win32_DiskDrivePhysicalMedia only contains references to the Physical Media and Disk Drive objects. You must, then, instatiate both objects to access their properties individually. Regards, Paulo