diff --git a/uppsrc/CtrlCore/DHCtrl.cpp b/uppsrc/CtrlCore/DHCtrl.cpp
index dbe28db01..d880f5deb 100644
--- a/uppsrc/CtrlCore/DHCtrl.cpp
+++ b/uppsrc/CtrlCore/DHCtrl.cpp
@@ -64,12 +64,11 @@ void DHCtrl::OpenHWND()
 	GuiLock __;
 	CloseHWND();
 	HWND phwnd = GetTopCtrl()->GetHWND();
-	if(phwnd) {
+	if(phwnd)
 		CreateWindowEx(0, "UPP-CLASS-A", "",
 		               WS_CHILD|WS_DISABLED|WS_VISIBLE,
 		               0, 0, 20, 20,
 		               phwnd, NULL, hInstance, this);
-	}
 }
 
 void DHCtrl::SyncHWND()
@@ -102,6 +101,7 @@ DHCtrl::DHCtrl()
 {
 	hwnd = NULL;
 	isdhctrl = true;
+	BackPaint(EXCLUDEPAINT);
 }
 
 DHCtrl::~DHCtrl()
diff --git a/uppsrc/CtrlCore/Win32Wnd.cpp b/uppsrc/CtrlCore/Win32Wnd.cpp
index b0689a53e..e4b43befc 100644
--- a/uppsrc/CtrlCore/Win32Wnd.cpp
+++ b/uppsrc/CtrlCore/Win32Wnd.cpp
@@ -8,7 +8,7 @@ namespace Upp {
 #define LOGTIMING 0
 
 #ifdef _DEBUG
-// #define LOGMESSAGES 1
+#define LOGMESSAGES 1
 #endif
 
 #define ELOGW(x)   // RLOG(GetSysTime() << ": " << x) // Only activate in MT!
@@ -675,7 +675,7 @@ LRESULT CALLBACK Ctrl::WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lP
 			}
 #endif
 	LRESULT l = 0;
-	if(w && w->GetHWND()) {
+	if(w && (w->GetHWND() || w->isdhctrl)) {
 #if defined(_DEBUG) && LOGTIMING
 			int ticks = msecs();
 			String wname = w->Name();