This
parameter can contain any of the following flags:
Note: The MCI_NOTIFY flag is not valid for this message.
MCI_WAIT
Control is not to be returned until the
action indicated by this message is completed or an error occurs.
MCI_QUERYCURRENTSETTING
This flag queries the current setting of the indicated
audio attribute.
MCI_QUERYSAVEDSETTING
This
flag queries the saved setting of the indicated audio attribute.
MCI_SAVESETTING
This flag saves the current setting of the indicated
audio attribute to the INI file.
MCI_MASTERVOL
This
flag sets the system master volume level as a percentage. If a number greater
than 100 is given then 100 will be used as the master volume setting and
no error will be returned.
MCI_SPEAKERS
This
flag sets the output to speakers.
MCI_HEADPHONES
This flag sets the output to headphones.
MCI_ON
This flag sets the output on or enabled. This
flag must be used in conjunction with the MCI_SPEAKERS or MCI_HEADPHONES
flag.
MCI_OFF
This flag
sets output off or disabled. This flag must be used in conjunction with
the MCI_SPEAKERS or MCI_HEADPHONES flag.