hhctrl.ocx: Use separate icons for 'Hide' and 'Show' toolbar buttons based on the HIST_VIEWTREE icon.
diff --git a/dlls/hhctrl.ocx/help.c b/dlls/hhctrl.ocx/help.c
index fbb93d4..d710d3b 100644
--- a/dlls/hhctrl.ocx/help.c
+++ b/dlls/hhctrl.ocx/help.c
@@ -810,8 +810,8 @@
 
     if (dwButtonFlags & HHWIN_BUTTON_EXPAND)
     {
-        TB_AddButton(pButtons, (*pdwNumButtons)++, IDTB_EXPAND, nHistBitmaps + HIST_VIEWTREE);
-        TB_AddButton(pButtons, (*pdwNumButtons)++, IDTB_CONTRACT, nHistBitmaps + HIST_VIEWTREE);
+        TB_AddButton(pButtons, (*pdwNumButtons)++, IDTB_EXPAND, nHHBitmaps + HHTB_EXPAND);
+        TB_AddButton(pButtons, (*pdwNumButtons)++, IDTB_CONTRACT, nHHBitmaps + HHTB_CONTRACT);
 
         if (pHHInfo->WinType.fNotExpanded)
             pButtons[1].fsState |= TBSTATE_HIDDEN;