>The C0000005 error in VFP 6.0 has caused us to rethink portions of our contract. If we tell our customers that they must install IE 4.0 or DCOM, or our product won't work, what are the legal implications of this stance? Are there licensing fees involved with DCOM /IE4?

They can install IE4/DCOM9x. They don't have to make IE the default browser. The fact is...they really don't need IE4. There are some DLLs that VFP makes use of and the easiest way to get them is to install IE. Don't ask me what they are, because I don't know.