XmRepTypeGetNameList generates a null-terminated list of
the value names associated with the specified representation type.
Each value name is a null-terminated string. This routine allocates
memory for the returned data. The application must free
this memory using XtFree.
rep_type_id
Specifies the identification number of the representation type.
use_uppercase_format
Specifies a Boolean value that controls the format of the name
list. If True, each value name is in uppercase characters prefixed
by ``Xm''; if False, the names are in lowercase characters.