This macro is the same as wxT() in wx 2.8 but allows to write code compatible with wxWidgets 3 where it expands to nothing. See #12925 and r66968. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@66970 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775