fix bug in filterproc interface
diff --git a/Mac/Modules/dlg/Dlgmodule.c b/Mac/Modules/dlg/Dlgmodule.c
index 0cd9dbb..b297e1c 100644
--- a/Mac/Modules/dlg/Dlgmodule.c
+++ b/Mac/Modules/dlg/Dlgmodule.c
@@ -55,7 +55,7 @@
 	if (callback == NULL)
 		return 0; /* Default behavior */
 	Dlg_FilterProc_callback = NULL; /* We'll restore it when call successful */
-	args = Py_BuildValue("O&s#", DlgObj_New, dialog, event, (int)sizeof(EventRecord));
+	args = Py_BuildValue("O&O&", WinObj_WhichWindow, dialog, PyMac_BuildEventRecord, event);
 	if (args == NULL)
 		res = NULL;
 	else {