🚀 go-pugleaf

Hi all, have made a few posts regarding my current project which involves
implimneting a GINA stub.  I'm basically building a kind of generic GINA
which can be interfaced with a variety of different hardware authentication
devices (bio-metrics etc...).

One of the functional requirements is to over-ride the default 'Welcome
Screen' (CTRL-ALT-DEL or SAS screen).  There is no real problem here as I
simply ShowModal my dialog screen instead of forwarding it on to the next
GINA in the chain (msgina.dll).

However, according MSDN documentation, Winlogon will send an WLX_WM_SAS
message with the wParam set to WLX_SAS_TYPE_CTRL_ALT_DEL, to the top most
dialog box which has the focus.  Assuming this is the case I need to be able
to capture and process this message.  The only way I can see of achieving
this is to override / subclassing the WinProc for the TCustomSASNoticeForm.
I assume this is the correct method, however I don't seem to see any such
messages being sent.

Code Snipet:


void __fastcall TCustomSASNoticeForm::WndProc(Messages::TMessage &Message)
{
   switch (Message.Msg)
   {
      case WLX_WM_SAS            :  Caption = "WLX_WM Message recieved...";
                                                        break;
      case WM_MOUSEMOVE     :  Caption = "Mouse move message recieved...";

   }
   TForm::WndProc(Message);
}

Mouse move comes in fine but no other WLX_WM messages.  Does anyone have any
ideas?  As my assumptions correct and is my code for capturing these
messages correct?

Many thanks in advance,

Mike