Include or forward declares the classes used by the header to make it self-contained. Do not include wx/wx.h from the source file to make compiling it faster when not using PCH. This fixes compilation under Unix after SOC2010_RTC_IMAGES branch merge. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@65678 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775