Fix for Vista splittree problem, by John Dallaway

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@54892 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

contrib/src/gizmos/splittree.cpp

@@ -265,6 +265,10 @@ void wxRemotelyScrolledTreeCtrl::ScrollToLine(int WXUNUSED(posHoriz), int posVer
     if (!IsKindOf(CLASSINFO(wxGenericTreeCtrl)))
 #endif // USE_GENERIC_TREECTRL
     {
+        // JLD - 2008-07-31 - call SetScrollInfo() - Vista ignores nPos passed in WM_VSCROLL wParam
+        SCROLLINFO si = {sizeof(SCROLLINFO), SIF_POS, 0, 0, 0, posVert, 0};
+        SetScrollInfo((HWND) GetHWND(), SB_VERT, &si, FALSE);
+
         UINT sbCode = SB_THUMBPOSITION;
         HWND vertScrollBar = 0;
         MSWDefWindowProc((WXUINT) WM_VSCROLL, MAKELONG(sbCode, posVert), (WXLPARAM) vertScrollBar);