Index: PC/msvcrtmodule.c
===================================================================
--- PC/msvcrtmodule.c	(revision 69093)
+++ PC/msvcrtmodule.c	(working copy)
@@ -27,6 +27,7 @@
 #include <crtassem.h>
 #endif
 #endif
+#include <crtdbg.h>
 
 // Force the malloc heap to clean itself up, and free unused blocks
 // back to the OS.  (According to the docs, only works on NT.)
@@ -279,7 +280,19 @@
 	}
 }
 
+// CRT assertion handling and reporting functions.
+static PyObject *
+msvcrt_CrtSetReportMode(PyObject *self, PyObject *args)
+{
+	int reportType, reportMode;
 
+	if (!PyArg_ParseTuple(args, "ii:CrtSetReportMode",
+			      &reportType, &reportMode))
+		return NULL;
+
+	return PyInt_FromLong(_CrtSetReportMode(reportType, reportMode));
+}
+
 /* List of functions exported by this module */
 static struct PyMethodDef msvcrt_functions[] = {
 	{"heapmin",		msvcrt_heapmin, METH_VARARGS},
@@ -298,6 +311,7 @@
 	{"putwch",		msvcrt_putwch, METH_VARARGS},
 	{"ungetwch",		msvcrt_ungetwch, METH_VARARGS},
 #endif
+	{"CrtSetReportMode",	msvcrt_CrtSetReportMode, METH_VARARGS},
 	{NULL,			NULL}
 };
 
@@ -334,4 +348,13 @@
 					__LIBRARIES_ASSEMBLY_NAME_PREFIX);
 	if (st < 0)return;
 #endif
+	// _CrtSetReportMode() constants
+	insertint(d, "_CRT_WARN", _CRT_WARN);
+	insertint(d, "_CRT_ERROR", _CRT_ERROR);
+	insertint(d, "_CRT_ASSERT", _CRT_ASSERT);
+
+	insertint(d, "_CRTDBG_MODE_DEBUG", _CRTDBG_MODE_DEBUG);
+	insertint(d, "_CRTDBG_MODE_FILE", _CRTDBG_MODE_FILE);
+	insertint(d, "_CRTDBG_MODE_WNDW", _CRTDBG_MODE_WNDW);
+	insertint(d, "_CRTDBG_REPORT_MODE", _CRTDBG_REPORT_MODE);
 }