The modules command helps you keep track of modules by listing module names.
To list the names of modules containing debugging information that have already been read into dbx, type:
(dbx) modules [-v] -read
To list the names of all program modules regardless of whether they contain debugging information:
(dbx) modules [-v]
To list all program modules that contain debugging information:
(dbx) modules [-v] -debug
where:
Specifies verbose mode, which prints language, file names, and so on.