>In the world of FoxPro 2.6 for DOS I could memvars in my main startup prg and they would be avalable in all parts of my app. I am having trouble understanding how vars work in VFP. Is there any simple rule(s) or can anyone tell me of a good reference source? I would like to create them in the main prg and then change them in forms. I can't understand what I am doing wrong.
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>ps. Thanks all the people who have been helping an old DOS programmer come out of the stone age.

The simple rule that vars (except LOCAL) are obsolete. Public vars evolved to oApp (application object) properties, and private vars became object properties.