>Hi Naoto.
>
>>Recently ran into problem at customer site where after a recent Microsoft Update, every time our application tries to access certain ActiveX controls (e.g. comdlg32.ocx -- common dialog control), it triggers the running of a setup program or an update msi.
>
>See http://doughennig.blogspot.com/2007/11/fixing-reinstall-your-app-problem.html
>
>Doug

Thank! This does appear to be the one I was remembering - will need look into this a bit further on the customer site to verify that this is indeed the issue.