>Hi,
>I have an application written using VFP6. Recently, I have write an addon to the app using VFP8. I issue DO ("myapp.exe") to call my addon app.
>
>1. Will my addon app run using VFP6 runtime oR VFP8 runtime? Are they in seperate process?
>2. I also faced problem that, my VFP8 app will do something to any existing toolbar, and it may crash becoz some property not exist/difference valid value in VFP6 such as specialeffect.
>
>What is the "fact" of calling app with diff version?
>How to make them run "seperately"?
>
>Thank you


My suggestion is. Create a BFP 8.0 loader to start the VFP 6.0 application. Therefore, when the 6.0 app calls the 8.0 add-on, it is in fact using the 8.0 runtime. Your 6.0 app should have no problem run in the 8.0 run-time.

P.S. In the loader place the statement SET ENGINEBEHAVIOR 70 so that your 6.0 SQL statements will work as expected.