SUB Dplot_quit(INTEGER Sys_chn,Result,OPTIONAL INTEGER Verbose,Csub_unload,Dde_clean,App_quit)
!
! Terminates the communication with DDE application. Here is how it works:
!
! 1. The DDE communication channels will be closed
! 2. The DDE CSUB library will be removed from memory
!
! INPUT: Sys_Chn = System channel to application
! App_quit = 1 the DPlot will be closed immediately
! 2 the user will be asked to quit the application
! >2 the user will be asked and the dialog will
! disappear after the specified number of seconds
! (so if App_quit=5 the timeout is 5 seconds)
! Csub_unload = If set to 1 then unload the CSUB library
! Dde_clean = If set to 1 then DdeClean will be called
DPlot_quit de-initializes the GRAPH-XT library and closes DPlot is desired (see variable App_quit).