extract (and expand and clean up and document) the header window implementation used inside the generic wxDataViewCtrl in a separate wxHeaderCtrl class which could be reused in (generic) wxListCtrl and, most importantly, wxGrid later

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@57093 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/test_vc8_test_gui.vcproj

@@ -895,6 +895,10 @@
 				RelativePath=".\misc\guifuncs.cpp"
 				>
 			</File>
+			<File
+				RelativePath=".\controls\headerctrltest.cpp"
+				>
+			</File>
 			<File
 				RelativePath=".\html\htmlwindow.cpp"
 				>