last check in forgot to add WS_VSCROLL to the listbox sttyle, added back to reenable the vertical scrollbar

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@26675 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/listbox.cpp

@@ -210,6 +210,10 @@ WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 {
     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 
+    // always show the vertical scrollbar if necessary -- otherwise it is
+    // impossible to use the control with the mouse
+    msStyle |= WS_VSCROLL;
+
     // we always want to get the notifications
     msStyle |= LBS_NOTIFY;