Index: src/sdk/cbstyledtextctrl.cpp
===================================================================
--- src/sdk/cbstyledtextctrl.cpp    (revision 8587)
+++ src/sdk/cbstyledtextctrl.cpp    (working copy)
@@ -468,6 +468,7 @@
     int style = GetStyleAt(pos);
     event.SetInt(style);
     event.SetEditor(editor);
+    event.SetExtraLong(0); // allow plugins to recommend each other not to cancel a tooltip
     Manager::Get()->GetPluginManager()->NotifyPlugins(event);
 }
 
Index: src/plugins/codecompletion/codecompletion.cpp
===================================================================
--- src/plugins/codecompletion/codecompletion.cpp    (revision 8587)
+++ src/plugins/codecompletion/codecompletion.cpp    (working copy)
@@ -2513,7 +2513,7 @@
         return;
     }
 
-    if (ed->GetControl()->CallTipActive())
+    if (ed->GetControl()->CallTipActive() && event.GetExtraLong() == 0)
         ed->GetControl()->CallTipCancel();
 //        CCLogger::Get()->DebugLog(F(_T("CodeCompletion::OnEditorTooltip: %p"), ed));
     /* NOTE: The following 2 lines of codes can fix [Bug #11785].
@@ -2604,6 +2604,7 @@
                 pos = lnStart;
 
             ed->GetControl()->CallTipShow(pos, calltip);
+            event.SetExtraLong(1);
             TRACE(calltip);
         }
     }
Index: src/plugins/contrib/SpellChecker/SpellCheckerPlugin.cpp
===================================================================
--- src/plugins/contrib/SpellChecker/SpellCheckerPlugin.cpp    (revision 8587)
+++ src/plugins/contrib/SpellChecker/SpellCheckerPlugin.cpp    (working copy)
@@ -832,4 +832,6 @@
         pos = lnStart;
 
     stc->CallTipShow(pos, tip);
+    event.SetExtraLong(1); // notify CC not to cancel this tooltip
+    event.Skip();
 }