>>It turns out that the first FF in the hex string is not required and if I omit it, things work fine. Cesar and Carlos had an explaination as to why.
>
>So it was in the original code just for fun?

No. That wouldn't be my idea of fun. I simply started wtih the PowerBasic version of an include file that had those constants defined as noted in my original message. This file was included with RMChart's samples.

I'm assuming that PowerBasic (in combination with RMChart) somehow handled those definitions correctly and VFP cannot without removing the leading FFs.