The following example changes the default editor to Brief, to Write, the Windows editor and back to the dBASE Plus editor:

set editor to "c:\brief\b"
// now c:\brief does not need to be in the path statements
// modify command now accesses Brief.
modify command temp.prg
set editor to
modify command temp
// Reverts to dBASE Plus editor

You might not have sufficient RAM to access an external editor in which case dBASE Plus gives an "Unable to execute DOS" error message.