* I build a simple COM Object in Visual Basic 6 : its an "Active X DLL" project.
Name of the compound : CheckYear
Name of the object : LeapYear

The only one method of the object :
============================================================
Public Function IsLeapYear(yr As Variant) As Boolean
    'If year is divisible by 4 and not divisible by 100, or
    'It is divisible by 400, it is a leap year
    If (yr Mod 4 = 0 And yr Mod 100 <> 0) Or yr Mod 400 = 0 Then
        IsLeapYear = True
    Else
        IsLeapYear = False
    End If
    
End Function
============================================================

* I compile the VB6 project and obtain : Leapyear.dll

* I register this COM object in my windows 2000 server : regsvr32.exe Leapyear.dll

* I write the following php script : try.php
=========================================================
<pre>
<?php
  print "Hi\n";
  $exapp = new COM("CheckYear.LeapYear");
?>
</pre>
==========================================================

* I execute :
php -f try.php

* I obtain
<pre>
Hi
</pre>

And a Windows error popup appears :
==========================================================
php.exe - application error
The instruction at "0x10030729" referenced memory at "0x110022ec".  The memory could not be "read".
==========================================================

Do you know the reason of this error and how to correct it ?

Thanks,

Christian