-# filename, the second 'G', 'C' or 'M' for generic/common/msw files. Flags
-# column may be empty or contain some additional info about this file (only
-# compile it in 16bit mode, don't compile it with this or that compiler, &c)
+# filename, the second a letter corresonding a directory:
+# G /src/generic
+# C /src/common
+# M /src/msw
+# X /src/motif X for Xt
+# U /src/unix
+# R /src/gtk R for Robert
+# H /src/html
+# W /include/wx
+# K /include/wx/gtk K for gtK
+# F /include/wx/motif F for motiF
+# B /include/wx/msw B for Bill Gates
+# N /include/wx/generic N for geNeric
+# L /include/wx/html L for htmL
+# P /include/wx/protocol
+# S /include/wx/unix S for poSix
+#
+# The third column may be empty or contain some additional info about this
+# file (only compile it in 16bit mode, don't compile it with this or that
+# compiler, &c)