vt.rs

use windows::core::*;
use windows::Win32::System::Com::*;
use windows::Win32::UI::Accessibility::*;
use windows::Win32::UI::WindowsAndMessaging::*;

fn main() -> Result<()> {
    unsafe {
        let mut acc: Option<IAccessible> = None;
        AccessibleObjectFromWindow(
            GetDesktopWindow(),
            OBJID_WINDOW.0 as u32,
            &IAccessible::IID,
            &mut acc as *mut _ as _,
        )?;
        let acc = acc.unwrap();

        let mut children = [VARIANT::default()];
        let mut retrieved = 0;
        AccessibleChildren(&acc, 0, &mut children, &mut retrieved)?;

        let child = IDispatch::try_from(&children[0])?;
        assert_eq!(child.GetTypeInfoCount()?, 1);

        Ok(())
    }
}