>I created some procedures to translate some framework’s properties like captions, tooltiptext and message to Spanish, I’m doing this by hacking the .vcx library and replacing strings into the “properties” memo field and in some hard coded situations the “methods” memo field.
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>I recently upgraded to VFP 6.0 and now I’m receiving an unknown error code –5. I wonder if VFP 6.0 contains some kind of a checksum for the class properties.
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>I’d like to know if you can programmatically change class properties with VFP 6.0

Did you recompile your vcxs in 6.0?

COMPILE CLASSLIB MyLibrary.vcx