hwndDesktop (HWND) - input

      Desktop-window handle, or HWND_DESKTOP.

    hwnd (HWND) - input

      Handle of window to become system-modal window.

      If NULLHANDLE, system-modal state is ended, and input processing returns to its normal state.

    rc (BOOL) - returns

      Success indicator.

      TRUE

        Successful completion
      FALSE
        Error occurred.


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