Joann,

>If we upgrade to VFP 9.0, do we lose the capability of compiling for 6.0?
>We anticipitate needing to compile at both levels.

What Alex said. :-)

Plus, here is a caution from the VFP9 help file:

Visual Form and Class Extended Property Support
Visual FoxPro 9 allows you to create custom properties in your visual class (SCX or VCX file) whose values can contain carriage returns and/or be of length greater than 255 characters. If you specify a property with a value like this through the Properties Window (i.e., the Zoom dialog box), Visual FoxPro will store it in a format such that you will no longer be able to edit that class in older versions of Visual FoxPro.