All mouse capture-related data doesn't have to be declared in wxWindow itself and can just be global in wincmn.cpp, so move it there, this will facilitate further changes as they won't require recompiling everything any more. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74673 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775