mresReply (MRESULT) - returns

      Message-return data.

      Possible returns from WinGetLastError:

      PMERR_INVALID_PARAMETERS

        (0x1208) An invalid parameter was specified.
      PMERR_INVALID_HWND
        (0x1101) An invalid window handle was specified.
      PMERR_FUNCTION_NOT_SUPPORTED
        (0x1641) Function not supported.

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