Re: PostMessage return access denied

Bob Moore <>
Tue, 05 Jun 2007 20:46:21 +0100
On Mon, 04 Jun 2007 06:52:50 -0700, Gurmit Teotia wrote:

Yes, it's running. I've verified the error using "FormatMessage" as
well. I'm using following code to run "osk.exe"

Have you tried using a NULL DACL SD? See below:

static SECURITY_ATTRIBUTES g_sa = {0};
static HANDLE g_hsa = 0;

BOOL CreateNullDaclSd ()
   BOOL bRetVal = FALSE;
   g_sa.nLength = sizeof(g_sa);
   g_sa.lpSecurityDescriptor = GlobalLock(g_hsa);
   g_sa.bInheritHandle = TRUE;

   if (InitializeSecurityDescriptor (g_sa.lpSecurityDescriptor, 1))
      if (SetSecurityDescriptorDacl (g_sa.lpSecurityDescriptor,
         bRetVal = TRUE;
         OutputDebugString ("CNDS: cannot set sd DACL\n");
       OutputDebugString("CNDS: cannot initialise sd\n");
   return bRetVal;

void FreeNullDaclSd ()
   GlobalUnlock (g_hsa);
   GlobalFree (g_hsa);

Bob Moore
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