diff --git a/src/gui/kernel/qwidget_win.cpp b/src/gui/kernel/qwidget_win.cpp
index 1e8b030..faf2547 100644
--- a/src/gui/kernel/qwidget_win.cpp
+++ b/src/gui/kernel/qwidget_win.cpp
@@ -1897,6 +1897,7 @@ void QWidgetPrivate::setWindowOpacity_sys(qreal level)
     if (!isOpaque && ptrUpdateLayeredWindow && (data.window_flags & Qt::FramelessWindowHint)) {
         if (GetWindowLong(q->internalWinId(), GWL_EXSTYLE) & Q_WS_EX_LAYERED) {
             BLENDFUNCTION blend = {AC_SRC_OVER, 0, (int)(255.0 * level), AC_SRC_ALPHA};
+            qDebug()<< __FUNCTION__ << q<< "UpdateLayeredWindow" << level;
             ptrUpdateLayeredWindow(q->internalWinId(), NULL, NULL, NULL, NULL, NULL, 0, &blend, Q_ULW_ALPHA);
         }
         return;
@@ -1921,6 +1922,7 @@ void QWidgetPrivate::setWindowOpacity_sys(qreal level)
     } else if (wl&Q_WS_EX_LAYERED) {
         SetWindowLong(q->internalWinId(), GWL_EXSTYLE, wl & ~Q_WS_EX_LAYERED);
     }
+    qDebug()<< __FUNCTION__ << q<< "SetLayeredWindowAttributes" << level;
     ptrSetLayeredWindowAttributes(q->internalWinId(), 0, (int)(level * 255), Q_LWA_ALPHA);
 }
 #endif //Q_WS_WINCE
diff --git a/src/gui/painting/qwindowsurface_raster.cpp b/src/gui/painting/qwindowsurface_raster.cpp
index 3493dd8..da4d0df 100644
--- a/src/gui/painting/qwindowsurface_raster.cpp
+++ b/src/gui/painting/qwindowsurface_raster.cpp
@@ -189,6 +189,7 @@ void QRasterWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoi
         BLENDFUNCTION blend = {AC_SRC_OVER, 0, (int)(255.0 * window()->windowOpacity()), Q_AC_SRC_ALPHA};
         RECT dirty = {dirtyRect.x(), dirtyRect.y(),
             dirtyRect.x() + dirtyRect.width(), dirtyRect.y() + dirtyRect.height()};
+        qDebug() << __FUNCTION__ << widget << "UpdateLayeredWindowIndirect from " << d->image->hdc;
         Q_UPDATELAYEREDWINDOWINFO info = {sizeof(info), NULL, &ptDst, &size, d->image->hdc, &ptSrc, 0, &blend, Q_ULW_ALPHA, &dirty};
         ptrUpdateLayeredWindowIndirect(window()->internalWinId(), &info);
     } else
@@ -199,6 +200,7 @@ void QRasterWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoi
         HDC widget_dc = widget->getDC();
 
         QRect wbr = br.translated(-wOffset);
+        qDebug() <<__FUNCTION__ << widget <<  "BitBlt";
         BitBlt(widget_dc, wbr.x(), wbr.y(), wbr.width(), wbr.height(),
                d->image->hdc, br.x() + offset.x(), br.y() + offset.y(), SRCCOPY);
         widget->releaseDC(widget_dc);