* mainloop.py: added facility for calling select(). Also added
embryonic facility for pseudo-modal dialogs.
* stdwinevents.py: added modifier masks for key/mouse events
* renamed exceptions in nntplib.py
* Changed string.join() to call string.joinfields() to profit of
strop.joinfields()
diff --git a/Lib/lib-stdwin/stdwinevents.py b/Lib/lib-stdwin/stdwinevents.py
index 9f22dd9..62cf8d2 100644
--- a/Lib/lib-stdwin/stdwinevents.py
+++ b/Lib/lib-stdwin/stdwinevents.py
@@ -44,3 +44,18 @@
WS_CLIPBOARD = 0
WS_PRIMARY = 1
WS_SECONDARY = 2
+
+# Modifier masks in key and mouse events
+
+WM_SHIFT = (1 << 0)
+WM_LOCK = (1 << 1)
+WM_CONTROL = (1 << 2)
+WM_META = (1 << 3)
+WM_OPTION = (1 << 4)
+WM_NUM = (1 << 5)
+
+WM_BUTTON1 = (1 << 8)
+WM_BUTTON2 = (1 << 9)
+WM_BUTTON3 = (1 << 10)
+WM_BUTTON4 = (1 << 11)
+WM_BUTTON5 = (1 << 12)