This allows the code in wxWindowMSW::HandleCtlColor() to find the correct control when handling the messages from the buddy control and hence setting the colours for wxSpinCtrl works after this change. Closes #1691. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61845 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775