pub unsafe extern "system" fn PSPropertyBag_ReadUnknown(
    propbag: IPropertyBag,
    propname: PCWSTR,
    riid: *const GUID,
    ppv: *mut *mut c_void
) -> HRESULT
Expand description

Required features: "Win32_UI_Shell_PropertiesSystem", "Win32_System_Com_StructuredStorage"