uses the built-in input method which is required
even for getting European characters. Key down
events probably don't work anymore. It is still
impossible to receive Unicode characters due to
the limitations of wxKeyEvent.
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_4_BRANCH@17579 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775