Querying static WinRT methods using Go

main.go

package main

import (
	"unsafe"
	"syscall"

	"github.com/go-ole/go-ole"
)

type IBluetoothAdapterStatics struct {
	ole.IInspectable
}

type IBluetoothAdapterStaticsVtbl struct {
	ole.IInspectableVtbl
	GetDeviceSelector uintptr
	FromIdAsync       uintptr
	GetDefaultAsync   uintptr
}

func (v *IBluetoothAdapterStatics) VTable() *IBluetoothAdapterStaticsVtbl {
	return (*IBluetoothAdapterStaticsVtbl)(unsafe.Pointer(v.RawVTable))
}

func (v *IBluetoothAdapterStatics) GetDeviceSelector() (id string, err error) {
	var hstring ole.HString
	hr, _, _ := syscall.Syscall(
		v.VTable().GetDeviceSelector,
		2,
		uintptr(unsafe.Pointer(v)),
		uintptr(unsafe.Pointer(&hstring)),
		0)
	if hr != 0 {
		err = ole.NewError(hr)
		return
	}
	id = hstring.String()
	ole.DeleteHString(hstring)
	return
}

func main() {
	ole.RoInitialize(1)
	factory, _ := ole.RoGetActivationFactory("Windows.Devices.Bluetooth.BluetoothAdapter", ole.IID_IInspectable)
	adapterObj, _ := factory.QueryInterface(ole.NewGUID("8B02FB6A-AC4C-4741-8661-8EAB7D17EA9F"))
	adapter := (*IBluetoothAdapterStatics)(unsafe.Pointer(adapterObj))
	selector, _ := adapter.GetDeviceSelector()
	println("selector:", selector)
}