Windows Management Instrumentation (WMI) Samples
Explore a curated collection of sample code and projects to help you understand and utilize Windows Management Instrumentation (WMI) effectively within your driver development.
Basic WMI Provider Sample
A fundamental example demonstrating how to create a custom WMI provider to expose driver information.
// SampleProvider.cpp
#include <windows.h>
#include <wbemidl.h>
// ... (Full WMI provider implementation details)
HRESULT __stdcall DllRegisterServer() {
// Registration logic
return S_OK;
}
HRESULT __stdcall DllUnregisterServer() {
// Unregistration logic
return S_OK;
}
Querying Driver Status with WMI
Learn how to query WMI for real-time status and performance metrics of your Windows drivers.
// QueryDriverStatus.cpp
#include <iostream>
#include <comdef.h>
#include <Wbemidl.h>
// ... (Code to connect to WMI and execute a query)
int main() {
// IWbemServices* pSvc = ...;
// BSTR query = SysAllocString(L"SELECT * FROM Win32_PnPEntity WHERE Name LIKE '%MyDriver%'");
// ...
return 0;
}
WMI Event Notification for Driver Events
Implement WMI event consumers to receive notifications when specific driver events occur.
// WmiEventConsumer.cpp
#include <iostream>
#include <Wbemcli.h>
// ... (Implementation for receiving WMI events)
int main() {
// IWbemServices* pServices = ...;
// BSTR query = SysAllocString(L"SELECT * FROM MyDriverEvent");
// ...
return 0;
}
Advanced WMI Class Association
Explore how to define and manage associations between different WMI classes related to your driver.
// WmiAssociations.mof
#pragma namespace("\\\\.\\root\\cimv2")
[dynamic, provider("MyDriverProvider"), ClassVersion("1.0.0")]
class MyDriverConfig {
[key] string InstanceName;
uint32 MaxThreads;
};
[dynamic, provider("MyDriverProvider")]
class MyDriverInstance {
[key] string DeviceID;
string DriverVersion;
};
[Association, dynamic, provider("MyDriverProvider")]
class MyDriverConfigToInstance {
[keyref] MyDriverConfig ref Config;
[keyref] MyDriverInstance ref Instance;
};