hwndDeskTop (HWND) - input

      Desktop-window handle.

      HWND_DESKTOP

        The desktop-window handle
      Other
        Specified desktop-window handle.

      hwndNewFocus (HWND) - input

        Window handle to receive the focus.

      flFocusChange (ULONG) - input

        Focus changing indicators.

        These indicators are passed on in the WM_FOCUSCHANGE message:

        FC_NOSETFOCUS

          Do not send the WM_SETFOCUS message to the window receiving the focus.
        FC_NOLOSEFOCUS
          Do not send the WM_SETFOCUS message to the window losing the focus.
        FC_NOSETACTIVE
          Do not send the WM_ACTIVATE message to the window being activated.
        FC_NOLOSEACTIVE
          Do not send the WM_ACTIVATE message to the window being deactivated.
        FC_NOSETSELECTION
          Do not send the WM_SETSELECTION message to the window being selected.
        FC_NOLOSESELECTION
          Do not send the WM_SETSELECTION message to the window being deselected.
        FC_NOBRINGTOTOP
          Do not bring any window to the top.
        FC_NOBRINGTOTOPFIRSTWINDOW
          Do not bring the first frame window to the top.

        rc (BOOL) - returns

          Success indicator.

          TRUE

            Successful completion
          FALSE
            Error occurred.

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