You keep using the "cobol" command. As Larry and I suggested, you need to use the "cob" command on UNIX. This command can do a compile or link (or both). Normally, there is no "cobol" command on UNIX for Visual COBOL, but it looks like you have one that is a compile-only command.
We understand that you don't desire a command-line solution. However, if the command-line solution works for you, it should be a strong hint on how to accomplish the solution in Eclipse. It would just be a matter of getting Eclipse to pass the "-I COBWIN2" to the link step of the project. Neither Larry nor I have an Eclipse environment to explore how to do this in detail. Larry has offered to look into this on Monday if you are not able to work it out on your own with your Eclipse environment.
This will link in cobwin2.obj, which contains the required entry points for popup windows. Note that no space is allowed between the -o option and its argument, the output file name. After the -o option and its argument, list the object files in your project plus cobwin2.obj.
Recent badge winners
Neil Morrishas earned the badge Consistent Trajectory