src/java.desktop/windows/native/libawt/windows/awt_Window.cpp

@@ -380,10 +380,13 @@
     }
 
     if (wp->flags & SWP_HIDEWINDOW) {
         EnableTranslucency(FALSE);
     }
+    if (wp->flags & SWP_SHOWWINDOW) {
+        EnableTranslucency(TRUE);
+    }
 
     return mrDoDefault;
 }
 
 LPCTSTR AwtWindow::GetClassName() {