Juan,

John Petersen has a utility that manipulates sets of field mapping. I think you can get the file from the MSDN website. You can easily use RegEdit to save that subtree of the registry to a .REG file, edit the .REG and double click it to switch the mappings.

>I have assigned some classes from a library to VFP fields, i mean: Tools, Options, Fields, etc., Set as default.
>Is there an easy and faster way to assign different classes from another library? or do i have to re-assign them again, one at a time?.