add jaraco to test sym links on Windows. Fixes #894

libs/jaraco/windows/api/message.py

@@ -0,0 +1,50 @@
+#!/usr/bin/env python
+
+"""
+jaraco.windows.message
+
+Windows Messaging support
+"""
+
+import ctypes
+from ctypes.wintypes import HWND, UINT, WPARAM, LPARAM, DWORD, LPVOID
+
+import six
+
+LRESULT = LPARAM
+
+class LPARAM_wstr(LPARAM):
+	"""
+	A special instance of LPARAM that can be constructed from a string
+	instance (for functions such as SendMessage, whose LPARAM may point to
+	a unicode string).
+	"""
+	@classmethod
+	def from_param(cls, param):
+		if isinstance(param, six.string_types):
+			return LPVOID.from_param(six.text_type(param))
+		return LPARAM.from_param(param)
+
+SendMessage = ctypes.windll.user32.SendMessageW
+SendMessage.argtypes = (HWND, UINT, WPARAM, LPARAM_wstr)
+SendMessage.restype = LRESULT
+
+HWND_BROADCAST=0xFFFF
+WM_SETTINGCHANGE=0x1A
+
+# constants from http://msdn.microsoft.com/en-us/library/ms644952%28v=vs.85%29.aspx
+SMTO_ABORTIFHUNG = 0x02
+SMTO_BLOCK = 0x01
+SMTO_NORMAL = 0x00
+SMTO_NOTIMEOUTIFNOTHUNG = 0x08
+SMTO_ERRORONEXIT = 0x20
+
+SendMessageTimeout = ctypes.windll.user32.SendMessageTimeoutW
+SendMessageTimeout.argtypes = SendMessage.argtypes + (
+	UINT, UINT, ctypes.POINTER(DWORD)
+)
+SendMessageTimeout.restype = LRESULT
+
+def unicode_as_lparam(source):
+	pointer = ctypes.cast(ctypes.c_wchar_p(source), ctypes.c_void_p)
+	return LPARAM(pointer.value)