diff --git a/MakeEnums.c b/MakeEnums.c
new file mode 100644
index 0000000..6841a73
--- /dev/null
+++ b/MakeEnums.c
@@ -0,0 +1,136 @@
+#include <Finder.h>
+#include <Files.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <ctype.h>
+
+int strcasecmp(const char *s1, const char *s2)
+{
+  int a, b;
+  for (;;)
+  {
+    a = tolower(*s1++);
+    b = tolower(*s2++);
+
+    if (a < b) return -1;
+    if (a > b) return 1;
+
+    // a == b.
+    if (a == 0) return 0;
+
+  }
+}
+
+void dump_DirInfo(void)
+{
+  printf("/* DirInfo */\n");
+  printf("_qLink = %u,\n", offsetof(DirInfo, qLink));
+  printf("_qType = %u,\n", offsetof(DirInfo, qType));
+  printf("_ioTrap = %u,\n", offsetof(DirInfo, ioTrap));
+  printf("_ioCmdAddr = %u,\n", offsetof(DirInfo, ioCmdAddr));
+  printf("_ioCompletion = %u,\n", offsetof(DirInfo, ioCompletion));
+  printf("_ioResult = %u,\n", offsetof(DirInfo, ioResult));
+  printf("_ioNamePtr = %u,\n", offsetof(DirInfo, ioNamePtr));
+  printf("_ioVRefNum = %u,\n", offsetof(DirInfo, ioVRefNum));
+  printf("_ioFRefNum = %u,\n", offsetof(DirInfo, ioFRefNum));
+  printf("_ioFVersNum = %u,\n", offsetof(DirInfo, ioFVersNum));
+  printf("_filler1 = %u,\n", offsetof(DirInfo, filler1));
+  printf("_ioFDirIndex = %u,\n", offsetof(DirInfo, ioFDirIndex));
+  printf("_ioFlAttrib = %u,\n", offsetof(DirInfo, ioFlAttrib));
+  printf("_ioACUser = %u,\n", offsetof(DirInfo, ioACUser));
+  printf("_ioDrUsrWds = %u,\n", offsetof(DirInfo, ioDrUsrWds));
+  printf("_ioDrDirID = %u,\n", offsetof(DirInfo, ioDrDirID));
+  printf("_ioDrNmFls = %u,\n", offsetof(DirInfo, ioDrNmFls));
+  printf("_filler3 = %u,\n", offsetof(DirInfo, filler3));
+  printf("_ioDrCrDat = %u,\n", offsetof(DirInfo, ioDrCrDat));
+  printf("_ioDrMdDat = %u,\n", offsetof(DirInfo, ioDrMdDat));
+  printf("_ioDrBkDat = %u,\n", offsetof(DirInfo, ioDrBkDat));
+  printf("_ioDrFndrInfo = %u,\n", offsetof(DirInfo, ioDrFndrInfo));
+  printf("_ioDrParID = %u,\n", offsetof(DirInfo, ioDrParID));  
+  printf("\n");
+  printf("\n");
+}
+
+void dump_HFileInfo(void)
+{
+
+  printf("/* HFileInfo */\n");
+  printf("_qLink = %u,\n", offsetof(HFileInfo, qLink));
+  printf("_qType = %u,\n", offsetof(HFileInfo, qType));
+  printf("_ioTrap = %u,\n", offsetof(HFileInfo, ioTrap));
+  printf("_ioCmdAddr = %u,\n", offsetof(HFileInfo, ioCmdAddr));
+  printf("_ioCompletion = %u,\n", offsetof(HFileInfo, ioCompletion));
+  printf("_ioResult = %u,\n", offsetof(HFileInfo, ioResult));
+  printf("_ioNamePtr = %u,\n", offsetof(HFileInfo, ioNamePtr));
+  printf("_ioVRefNum = %u,\n", offsetof(HFileInfo, ioVRefNum));
+  printf("_ioFRefNum = %u,\n", offsetof(HFileInfo, ioFRefNum));
+  printf("_ioFVersNum = %u,\n", offsetof(HFileInfo, ioFVersNum));
+  printf("_filler1 = %u,\n", offsetof(HFileInfo, filler1));
+  printf("_ioFDirIndex = %u,\n", offsetof(HFileInfo, ioFDirIndex));
+  printf("_ioFlAttrib = %u,\n", offsetof(HFileInfo, ioFlAttrib));
+  printf("_ioACUser = %u,\n", offsetof(HFileInfo, ioACUser));
+  printf("_ioFlFndrInfo = %u,\n", offsetof(HFileInfo, ioFlFndrInfo));
+  printf("_ioDirID = %u,\n", offsetof(HFileInfo, ioDirID));
+  printf("_ioFlStBlk = %u,\n", offsetof(HFileInfo, ioFlStBlk));
+  printf("_ioFlLgLen = %u,\n", offsetof(HFileInfo, ioFlLgLen));
+  printf("_ioFlPyLen = %u,\n", offsetof(HFileInfo, ioFlPyLen));
+  printf("_ioFlRStBlk = %u,\n", offsetof(HFileInfo, ioFlRStBlk));
+  printf("_ioFlRLgLen = %u,\n", offsetof(HFileInfo, ioFlRLgLen));
+  printf("_ioFlRPyLen = %u,\n", offsetof(HFileInfo, ioFlRPyLen));
+  printf("_ioFlCrDat = %u,\n", offsetof(HFileInfo, ioFlCrDat));
+  printf("_ioFlMdDat = %u,\n", offsetof(HFileInfo, ioFlMdDat));
+  printf("_ioFlBkDat = %u,\n", offsetof(HFileInfo, ioFlBkDat));
+  printf("_ioFlXFndrInfo = %u,\n", offsetof(HFileInfo, ioFlXFndrInfo));
+  printf("_ioFlParID = %u,\n", offsetof(HFileInfo, ioFlParID));
+  printf("_ioFlClpSiz = %u,\n", offsetof(HFileInfo, ioFlClpSiz));
+  printf("\n");
+  printf("\n");
+
+}
+
+
+void dump_WDPBRec(void)
+{
+
+  printf("/* WDPBRec */\n");
+  printf("_qLink = %u,\n", offsetof(WDPBRec, qLink));
+  printf("_qType = %u,\n", offsetof(WDPBRec, qType));
+  printf("_ioTrap = %u,\n", offsetof(WDPBRec, ioTrap));
+  printf("_ioCmdAddr = %u,\n", offsetof(WDPBRec, ioCmdAddr));
+  printf("_ioCompletion = %u,\n", offsetof(WDPBRec, ioCompletion));
+  printf("_ioResult = %u,\n", offsetof(WDPBRec, ioResult));
+  printf("_ioNamePtr = %u,\n", offsetof(WDPBRec, ioNamePtr));
+  printf("_ioVRefNum = %u,\n", offsetof(WDPBRec, ioVRefNum));
+  printf("_filler1 = %u,\n", offsetof(WDPBRec, filler1));
+  printf("_ioWDIndex = %u,\n", offsetof(WDPBRec, ioWDIndex));
+  printf("_ioWDProcID = %u,\n", offsetof(WDPBRec, ioWDProcID));
+  printf("_ioWDVRefNum = %u,\n", offsetof(WDPBRec, ioWDVRefNum));
+  printf("_filler2 = %u,\n", offsetof(WDPBRec, filler2));
+  printf("_ioWDDirID = %u,\n", offsetof(WDPBRec, ioWDDirID));
+
+  printf("\n");
+  printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+  int i;
+
+  if (argc == 1)
+  {
+    dump_DirInfo();
+    dump_HFileInfo();
+    dump_WDPBRec();
+  }
+
+  for (i = 1; i < argc; ++i)
+  {
+    const char *name = argv[i];
+    if (strcasecmp(name, "DirInfo") == 0) { dump_DirInfo(); continue; }
+    if (strcasecmp(name, "HFileInfo") == 0) { dump_HFileInfo(); continue; }
+    if (strcasecmp(name, "WDPBRec") == 0) { dump_WDPBRec(); continue; }
+    fprintf(stderr, "Unsupported struct: %s\n", name);
+  }
+
+  return 0;
+}
\ No newline at end of file
diff --git a/makefile b/makefile
index 9756e7c..a3ba956 100644
--- a/makefile
+++ b/makefile
@@ -26,11 +26,11 @@ LDFLAGS = -w -c 'MPS ' -t MPST \
 
 # LDFLAGS = -d -c 'MPS ' -t MPST
 
-all: Help GetEnv Duplicate SetFile OverlayIIgs ListRez ListRezIIgs
+all: Help GetEnv Duplicate SetFile OverlayIIgs ListRez ListRezIIgs MakeEnums
 
 clean:
 	rm -f *.c.o
-	rm -f Help GetEnv Duplicate SetFile OverlayIIgs
+	rm -f Help GetEnv Duplicate SetFile OverlayIIgs MakeEnums
 
 GetEnv: GetEnv.c.o
 	mpw Link $(LDFLAGS) -o $@ $^ $(LIBS) 
@@ -56,6 +56,9 @@ ListRez: ListRez.c.o
 ListRezIIgs: ListRezIIgs.c.o
 	mpw Link $(LDFLAGS) -o $@ $^ $(LIBS) 
 
+MakeEnums: MakeEnums.c.o
+	mpw Link $(LDFLAGS) -o $@ $^ $(LIBS) 
+
 #SetFile.c : SetFile.rl
 #	ragel -G2 -p -m -o $@ $<