We have been using PDF.OCX on a form to preview pdf's. This has been working fine, but we find now that user's who have adobe 6 installed, then install our product are getting the following error:
"Could not find Acrobat External Window Handler"
The problem seems to be the registering of pdf.ocx in the win sys folder. If we re-register the pdf.ocx in the adobe folder all is ok again.