[mjansen] 72794: [MSGINA] Prevent an infinite loop in ShellDimScreen. CORE-12028

Author: mjansen
Date: Sat Sep 24 14:15:23 2016
New Revision: 72794

URL: http://svn.reactos.org/svn/reactos?rev=72794&view=rev
Log:
[MSGINA] Prevent an infinite loop in ShellDimScreen. CORE-12028

Modified:
    trunk/reactos/dll/win32/msgina/dimmedwindow.cpp

Modified: trunk/reactos/dll/win32/msgina/dimmedwindow.cpp
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/msgina/dimmedwin…
==============================================================================
--- trunk/reactos/dll/win32/msgina/dimmedwindow.cpp	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/msgina/dimmedwindow.cpp	[iso-8859-1] Sat Sep 24 14:15:23 2016
@@ -104,7 +104,7 @@
     {
         MSG msg;
 
-        while (!IsWindowVisible(m_hwnd))
+        while (!IsWindowVisible(m_hwnd) && IsWindow(m_hwnd))
         {
             while (::PeekMessage(&msg, m_hwnd, 0, 0, PM_REMOVE))
             {
@@ -261,6 +261,15 @@
 
     pWindow->WaitForInit();
 
+    if (!IsWindow(pWindow->Wnd()))
+    {
+        refcount = pWindow->AddRef();
+        while (refcount)
+            refcount = pWindow->Release();
+
+        return E_FAIL;
+    }
+
     _SEH2_TRY
     {
         hr = pWindow->QueryInterface(IID_IUnknown, pUnknown);