Type Alias UiaEventCallback 

pub type UiaEventCallback = Option<unsafe extern "system" fn(pargs: *mut UiaEventArgs, prequesteddata: *mut SAFEARRAY, ptreestructure: Ref<'_, BSTR>)>;

Aliased Type

pub enum UiaEventCallback {
    None,
    Some(unsafe extern "system" fn(*mut UiaEventArgs, *mut SAFEARRAY, Ref<'_, BSTR>)),
}

Variants

None

No value.

Some(unsafe extern "system" fn(*mut UiaEventArgs, *mut SAFEARRAY, Ref<'_, BSTR>))

Some value of type T.