A simple interface file for the above SGS example would be:
## SGSTEST - Test some SGS, PGPLOT or GKS graphics functions interface SGSTEST parameter DEVICE ptype ’DEVICE’ position 1 type ’GRAPHICS’
access ’read’ vpath ’prompt’ help ’Name of workstation to be used’
default xwindows endparameter endinterface
The same interface file can be used with the PGPTEST and GKSTEST programs if the line saying
‘interface SGSTEST’ is replaced by the line ‘interface PGPTEST’ or ‘interface GKSTEST.