https://bugs.winehq.org/show_bug.cgi?id=17205
--- Comment #11 from Dmitry Timoshkov dmitry@baikal.ru --- (In reply to Ken Sharp from comment #10)
Is this still an issue in Wine 1.7.45 or later?
Obviously yes, it is.
CTRL+C works in some applications at least.
Support for Ctrl+C in MessageBox is still not implemented.