Unloads a DCL file
(unload_dialog dcl_id)
Unloads the DCL file associated with dcl_id (obtained from a previous new_dialog call) from memory.
It is generally not necessary to unload a DCL definition from memory, unless you are running low on memory or need to update the DCL dialog definition from a new file.
Arguments
A DCL file identifier obtained from a previous load_dialog call.
Return Values
The unload_dialog function always returns nil.
The load_dialog and new_dialog functions.
