[PATCH 2/2] dinput: Use CALLWINDPROC hook to monitor focus loses away from acquired windows.

[Vitaliy Margolen]

This is required for dinput to release mouse and keyboard when foreground
window becomes background. But do this only when coop level is DISCL_FOREGROUND.

To accomplish this set global CALLWINDPROC hook and monitor some messages
sent to windows, associated with acquired DI devices. Because message itself
is not a guarantee that window is not foreground anymore, check this
explicitly.

Window sub-classing won't work if app subclasses the window itself. Also it
makes it complicated to track multiple devices associated with one window
(which is the case most of the time - with keyboard and mouse).


Almost a resend - I had rearranged few [Enter|Leave]CritSection calls in the
prior patch that should fix the deadlocking problem.

---
 dlls/dinput/dinput_main.c |   58 +++++++++++++++++++++++++++++++++++++++++++++
 dlls/dinput/tests/mouse.c |    1 -
 2 files changed, 58 insertions(+), 1 deletions(-)
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