diff --git a/scripts/tmp_main.py b/scripts/tmp_main.py
index e694840..9152af5 100644
--- a/scripts/tmp_main.py
+++ b/scripts/tmp_main.py
@@ -1,25 +1,16 @@
 # Initial test script
 import upiwin_tmp
 
-FBPRIMCLR_BLACK = 0x0000
-FBPRIMCLR_RED = 0xF800
-FBPRIMCLR_GREEN = 0x07E0
-FBPRIMCLR_BLUE = 0x001F
-FBPRIMCLR_YELLOW = 0xFFE0
-FBPRIMCLR_CYAN = 0x07FF
-FBPRIMCLR_MAGENTA = 0xF81F
-FBPRIMCLR_WHITE = 0xFFFF
+upiwin_tmp.filled_rectangle(10, 10, 50, 50, upiwin_tmp.FBPRIMCLR_RED, False)
+upiwin_tmp.filled_rectangle(60, 10, 100, 50, upiwin_tmp.FBPRIMCLR_GREEN, False)
+upiwin_tmp.filled_rectangle(110, 10, 150, 50, upiwin_tmp.FBPRIMCLR_BLUE, False)
+upiwin_tmp.filled_rectangle(10, 60, 50, 100, upiwin_tmp.FBPRIMCLR_CYAN, False)
+upiwin_tmp.filled_rectangle(60, 60, 100, 100, upiwin_tmp.FBPRIMCLR_MAGENTA, False)
+upiwin_tmp.filled_rectangle(110, 60, 150, 100, upiwin_tmp.FBPRIMCLR_YELLOW, False)
+upiwin_tmp.rectangle(10, 110, 150, 150, upiwin_tmp.FBPRIMCLR_WHITE, False)
+upiwin_tmp.line(10, 110, 150, 150, upiwin_tmp.FBPRIMCLR_WHITE, False)
+upiwin_tmp.line(10, 150, 150, 110, upiwin_tmp.FBPRIMCLR_WHITE, False)
 
-upiwin_tmp.filled_rectangle(10, 10, 50, 50, FBPRIMCLR_RED, False)
-upiwin_tmp.filled_rectangle(60, 10, 100, 50, FBPRIMCLR_GREEN, False)
-upiwin_tmp.filled_rectangle(110, 10, 150, 50, FBPRIMCLR_BLUE, False)
-upiwin_tmp.filled_rectangle(10, 60, 50, 100, FBPRIMCLR_CYAN, False)
-upiwin_tmp.filled_rectangle(60, 60, 100, 100, FBPRIMCLR_MAGENTA, False)
-upiwin_tmp.filled_rectangle(110, 60, 150, 100, FBPRIMCLR_YELLOW, False)
-upiwin_tmp.rectangle(10, 110, 150, 150, FBPRIMCLR_WHITE, False)
-upiwin_tmp.line(10, 110, 150, 150, FBPRIMCLR_WHITE, False)
-upiwin_tmp.line(10, 150, 150, 110, FBPRIMCLR_WHITE, False)
-
-upiwin_tmp.line(0, 180, 319, 180, FBPRIMCLR_RED, False);
-upiwin_tmp.line(0, 196, 319, 196, FBPRIMCLR_RED, False);
+upiwin_tmp.line(0, 180, 319, 180, upiwin_tmp.FBPRIMCLR_RED, False);
+upiwin_tmp.line(0, 196, 319, 196, upiwin_tmp.FBPRIMCLR_RED, False);
 upiwin_tmp.textout(10, 180, 'Amy was here!!!')
diff --git a/src/ep_upiwin_tmp.c b/src/ep_upiwin_tmp.c
index 339f72a..51adcfb 100644
--- a/src/ep_upiwin_tmp.c
+++ b/src/ep_upiwin_tmp.c
@@ -3,6 +3,7 @@
 #include "scode.h"
 #include "fbprimitive.h"
 #include "ep_init.h"
+#include "ep_util.h"
 
 static PyObject *do_setpixel(PyObject *self, PyObject *args)
 {
@@ -84,10 +85,30 @@ static PyModuleDef DefUPIWIN_tmp = {
   NULL                     /* no free function */
 };
 
+BEGIN_CONSTANT_TABLE(UPIWIN_tmpConstants)
+  /* primitive color values */
+  CONSTANT_INT_MACRO(FBPRIMCLR_BLACK)
+  CONSTANT_INT_MACRO(FBPRIMCLR_RED)
+  CONSTANT_INT_MACRO(FBPRIMCLR_GREEN)
+  CONSTANT_INT_MACRO(FBPRIMCLR_BLUE)
+  CONSTANT_INT_MACRO(FBPRIMCLR_YELLOW)
+  CONSTANT_INT_MACRO(FBPRIMCLR_CYAN)
+  CONSTANT_INT_MACRO(FBPRIMCLR_MAGENTA)
+  CONSTANT_INT_MACRO(FBPRIMCLR_WHITE)
+END_CONSTANT_TABLE
+
 PyObject *Epython_init_upiwin_tmp_module(void)
 {
   PyObject *module;
   
   module = PyModule_Create(&DefUPIWIN_tmp);
+  if (module)
+  {
+	if (FAILED(Epython_register_constants(module, UPIWIN_tmpConstants)))
+	{
+	  Py_DECREF(module);
+	  module = NULL;
+	}
+  }
   return module;
 }
diff --git a/src/ep_util.c b/src/ep_util.c
index ee12f4a..61184af 100644
--- a/src/ep_util.c
+++ b/src/ep_util.c
@@ -42,3 +42,33 @@ HRESULT Epython_trace_exception(void)
   Py_DECREF(traceback);
   return hr;
 }
+
+HRESULT Epython_register_constants(PyObject *module, PCREGCONSTANT const_table)
+{
+  HRESULT hr = S_OK;
+  int i = 0, rc;
+  
+  while (const_table[i].name)
+  {
+    switch (const_table[i].regtype)
+	{
+	  case 'i':
+		rc = PyModule_AddIntConstant(module, const_table[i].name, const_table[i].value.ival);
+		break;
+	  case 's':
+		rc = PyModule_AddStringConstant(module, const_table[i].name, const_table[i].value.sval);
+		break;
+	  default;
+	    Log(LERROR, "register_constants type '%c' unknown", const_table[i].regtype);
+	    return E_UNEXPECTED;
+	}
+	if (!rc)
+	{
+	  hr = E_FAIL;
+	  break;
+	}
+	++i;
+  }
+  
+  return hr;
+}
diff --git a/src/ep_util.h b/src/ep_util.h
index 5644889..0406aca 100644
--- a/src/ep_util.h
+++ b/src/ep_util.h
@@ -5,7 +5,26 @@
 #include <Python.h>
 #include "wintype.h"
 
+typedef struct tagREGCONSTANT {
+	CHAR regtype;
+	PCSTR name;
+	union {
+		LONG ival;
+		PCSTR sval;
+	} value;
+} REGCONSTANT, *PREGCONSTANT;
+
+typedef const REGCONSTANT *PCREGCONSTANT;
+
 extern void Epython_log_object(int level, const char *label, PyObject *object);
 extern HRESULT Epython_trace_exception(void);
+extern HRESULT Epython_register_constants(PyObject *module, PCREGCONSTANT const_table);
+
+#define BEGIN_CONSTANT_TABLE(name)    static const REGCONSTANT name[] = {
+#define CONSTANT_INT(name, value)     { 'i', name, { .ival = value } },
+#define CONSTANT_INT_MACRO(mac)       CONSTANT_INT(#mac, mac)
+#define CONSTANT_STRING(name, value)  { 's', name, { .sval = value } },
+#define CONSTANT_STRING_MACRO(mac)    CONSTANT_STRING(#mac, mac)
+#define END_CONSTANT_TABLE            { 0, NULL, { .sval = NULL } } };
 
 #endif /* __EP_UTIL_H_INCLUDED */