AltGr stand-alone test executable

[Harold Hunt]

Users with AltGr keys,

I've posted a modification of my keyboard message collector to:
http://www.msu.edu/~huntharo/xwin/KeyboardMessages.zip (18 kB)

This test attempts to discard the fake Ctrl_L press/release that is
generated by Windows when a user presses the AltGr key on a non-U.S.
keyboard.  Fake Ctrl_L presses are detected by checking if the message
following an Ctrl_L press is an Alt_R release message with the same
timestamp as the Ctrl_L press; if such a message is found, we discard the
Ctrl_L press message.  Fake Ctrl_L releases are detected and discarded in a
similar manner.

If you get a chance, please run the executable, enter the following key
sequences, and send the generated keys.log file to the list.

The keystrokes I need are:
1) Ctrl_L down, Ctrl_L up
2) Alt_L down, Alt_L up
3) AltGr down, AltGr up
4) Ctrl_R down, Ctrl_R up
5) Ctrl_L down, AltGr down, Ctrl_L up, AltGr up

Hopefully I've got an AltGr user out there that can test this quickly,
though most of you are probably asleep, as I have a hunch that this test
should work and I'm really itching to get this problem fixed :)

Thanks for testing,

Harold