pszVDD (PSZ) - input

      The ASCIIZ name of the virtual device driver to be opened.

    phvdd (PHVDD) - output

      A pointer to the HVDD in which the handle of the virtual device driver is returned.

    ulrc (APIRET) - returns

      Return Code.

      DosOpenVDD returns one of the following values:

    • NO_ERROR 643
        ERROR_VDD_NOT_FOUND
      644
        ERROR_INVALID_CALLER
      For a full list of error codes, see Errors.

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