diff --git a/uppsrc/CtrlCore/CtrlCore.h b/uppsrc/CtrlCore/CtrlCore.h
index 7d846a219..d62789bac 100644
--- a/uppsrc/CtrlCore/CtrlCore.h
+++ b/uppsrc/CtrlCore/CtrlCore.h
@@ -60,6 +60,7 @@ int  LeaveGuiMutexAll();
 void EnterGuiMutex(int n);
 
 bool ThreadHasGuiLock();
+int  GetGuiLockLevel();
 #else
 inline void EnterGuiMutex() {}
 inline void LeaveGuiMutex() {}
diff --git a/uppsrc/CtrlCore/CtrlMt.cpp b/uppsrc/CtrlCore/CtrlMt.cpp
index 30ce09f77..85365aac5 100644
--- a/uppsrc/CtrlCore/CtrlMt.cpp
+++ b/uppsrc/CtrlCore/CtrlMt.cpp
@@ -64,6 +64,11 @@ bool ThreadHasGuiLock()
 	return Thread::IsMain() || sGLockLevel;
 }
 
+int  GetGuiLockLevel()
+{
+	return sGLockLevel;
+}
+
 void WakeUpGuiThread();
 
 struct Ctrl::CallBox {
diff --git a/uppsrc/CtrlCore/GtkAfter.h b/uppsrc/CtrlCore/GtkAfter.h
index 9e8602432..05c65148f 100644
--- a/uppsrc/CtrlCore/GtkAfter.h
+++ b/uppsrc/CtrlCore/GtkAfter.h
@@ -18,7 +18,7 @@ int main(int argc, char **argv, const char **envptr) { \
 	UPP::AppInit__(argc, (const char **)argv, envptr); \
 	GUI_APP_MAIN_HOOK \
 	UPP::InitGtkApp(argc, argv, envptr); \
-	GuiMainFn_(); \
+	UPP::AppExecute__(GuiMainFn_); \
 	UPP::Ctrl::CloseTopCtrls(); \
 	UPP::ExitGtkApp(); \
 	UPP::AppExit__(); \