>With my old Fox2x app, is it possible to call a DLL that I have built with VFP9 ?
Is this a FP/DOS or FP/WIN application? For FP/WIN you should be able to use FPOLE.DLL. That's a 32 bit DLL which means you additionally need to deal with calling 32 bit API functions from 16 bit code. Rick Strahl has an article about doing this: