hi,
  i can't find anything that make this, it return -858993460

  hr = Fire_OutputData();
  if ( FAILED (hr ))
  {
    // ....
  }

  VC Client ( a dialog as the activex control container )
just go on, ignore this error and a VB client  show me : overflow.

  thanks a lot! very very much, i also found
http://www.*-*-*.com/
4.html
has the same dicuss as mine.

-858993460 is 0xCCCCCCCC which is a de{*filter*}'s way of saying
"uninitialized data". Somewhere in Fire_OutputData you have something
like

{
    HRESULT hr; // uninitialized
    return hr;

"For every complex problem, there is a solution that is simple, neat,
and wrong." H.L. Mencken

I just want to know-- did you convert the number, or just happen to know
that?

Converted using Calculator app shipped with all versions of Windows I
know of, starting with Win3.1
--
With best wishes,
    Igor Tandetnik

"For every complex problem, there is a solution that is simple, neat,
and wrong." H.L. Mencken

In Scientific mode (the default is Standard...) :)

--
=====================================
Alexander Nickolov
Microsoft MVP [VC], MCSD

MVP VC FAQ: http://www.mvps.org/vcfaq
=====================================