Hacker’s Guide to Visual FoxPro
An irreverent look at how Visual FoxPro really works. Tells you the inside scoop on every command, function, property, event and method of Visual FoxPro.
CLEAR WINDOWS
The last in the long list of Clear commands releases all user-defined windows from memory. It takes form windows as well as those defined with DEFINE WINDOW.
Usage
CLEAR WINDOWS
When form windows are released with CLEAR WINDOWS, the variables that reference them are not released—instead, they become .NULL.