How to Query Windows Management Instrumentation (WMI) from Go using COM Objects?

Querying WMI from Go: Using COM Objects

WMI (Windows Management Instrumentation) provides a standardized interface for accessing management and configuration information on Windows systems. In Go, it's possible to query WMI using the COM (Component Object Model) framework.

Using the "github.com/StackExchange/wmi" Package

The recommended approach is to utilize the "github.com/StackExchange/wmi" package, which provides a stable and comprehensive wrapper for WMI operations in Go. This package leverages the solution discussed in the accepted answer, simplifying the process of initializing COM and executing WMI queries.

Composing a WMI Query

To compose a WMI query, use the "ExecQuery" function provided by the package. For example:

import "github.com/StackExchange/wmi"

func main() {
    query := wmi.CreateQuery(&wmi.Query{
        Namespace: `root\cimv2`,
        Query:     `SELECT * FROM Win32_Process`,
    })

Executing the Query

Once the query is composed, execute it using the "Find" function:

results, err := query.Find()
if err != nil {
    // Handle error
}

Retrieving Results

The "Find" function returns a slice of "wmi.Record" objects, each representing a matching instance from the WMI namespace. To access the properties of a record:

for _, record := range results {
    name, err := record.Property("Name")
    if err != nil {
        // Handle error
    }

    fmt.Println(name.Value)
}

Example Code

Here is a complete example program demonstrating how to query WMI for process names:

package main

import (
    "fmt"
    "github.com/StackExchange/wmi"
)

func main() {
    query := wmi.CreateQuery(&wmi.Query{
        Namespace: `root\cimv2`,
        Query:     `SELECT Name FROM Win32_Process`,
    })

    results, err := query.Find()
    if err != nil {
        // Handle error
    }

    for _, record := range results {
        name, err := record.Property("Name")
        if err != nil {
            // Handle error
        }

        fmt.Println(name.Value)
    }
}

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