dcl-ws-r

dcl-ws-r is a variable defined in `dcl-mode.el'.
Its value is

"\\([ 	]*-[ 	]*\\(!.*\\)*
\\)*[ 	]*"

Documentation:
Regular expression describing white space in a DCL command line.
White space is any number of continued lines with only space,tab,endcomment
followed by space or tab.

You can customize this variable.