File system path to the directory in which the application database is stored.
A character string. Cannot be reset by an application program.
The $DBPath function is set to the value of the DBPath entry in the registry, or the value of the [ZIM] environment variable. If neither of the preceding values is set, the variable is set to the null string (which is interpreted as the current disk directory).
To indicate the current DBPath directory in a file name, start the name with a double quotation mark (“) character.