How do I stop events from bubbling up?

I have this window procedure running:

static LRESULT CALLBACK WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{

   switch (msg) {

      case WM_KEYDOWN:
      case WM_SYSKEYDOWN:
      case WM_KEYUP:
      case WM_SYSKEYUP:
         processKeyMessage( msg, wParam, lParam );
         break;
   }
   return DefWindowProc(hWnd, msg, wParam, lParam);
}

How do I stop the keyboard messages from bubbling up to the parent application once they're processed?  I tried return true; but they still get sent.
LVL 5
GENTPAsked:
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jkrCommented:
That should be

static LRESULT CALLBACK WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{

   switch (msg) {

      case WM_KEYDOWN:
      case WM_SYSKEYDOWN:
      case WM_KEYUP:
      case WM_SYSKEYUP:
         processKeyMessage( msg, wParam, lParam );
         return 0; // <----------------!
         break;
   }
   return DefWindowProc(hWnd, msg, wParam, lParam);
}

From the docs on these keyboard messages:

"An application should return zero if it processes this message"

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GENTPAuthor Commented:
d'oh.  Thanks.
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