Syntax:
The /d_lines, /4ccD, or /4ccd options indicate that lines in fixed-format files that contain a D in column 1 should be treated as source code. Specifying /nod_lines (the default) indicates that these lines are to be treated as comment lines.
In the visual development environment, specify Compile DEBUG (D) Lines in the Debug Compiler Option Category.
The compiler does not support the use of characters other than a D or d with the
/4ccstring (see the dlines Sample program in ...\Samples\Advanced\com\).