The module SCRNSAVE.mod exists in cvf 6.6 Include but is not documented anywhere.
dznyone know what it does?
It's the .mod of the corresponding .f90 which looks to me like a screen saver.
Actually, like most of the modules there, it's a collection of interfaces to a portion of the Win32 API - in this case, the portion that deals with screen savers. Look in the on-disk documentation index under "Screen saver library".