How could xlc functions be called?

[S1nus]

Hi Marcus,

I was wondering if you know of how I might be able to call the xlc functions using this. Typically, this is done with the Excel12(...) or Excel12v(...) functions.

#[no_mangle]
pub extern "stdcall" fn xlAlert() -> LPXLOPER12 {
  let result = Box::new(Variant:;from_str("Tried to alert"));
  let alert_text = Box::new(Variant::from_str("Hello from Rust"));
  let alert_text_xloper = Box::into_raw(alert_text) as LPXLOPER12;
  unsafe {
    Excel12(xlcAlert as i32, alert_text_xloper, 1);
  }
  Box::into_raw(result) as LPXLOPER12
}

I get an "unresolved external symbol" error